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Finding the Fourth Proportional to 239,240,692.80, 358,861,039.20 and 85,866,820.20

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Solution

The fourth proportional to 239,240,692.80, 358,861,039.20 and 85,866,820.20 is: 128,800,230.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,240,692.80 : 358,861,039.20 = 85,866,820.20 : x
  2. Step 2: Convert to fraction form
    239,240,692.80/358,861,039.20 = 85,866,820.20/x
  3. Step 3: Cross multiply
    239,240,692.80x = 358,861,039.20 × 85,866,820.20
  4. Step 4: Simplify right side
    239,240,692.80x = 30,814,256,329,771,552
  5. Step 5: Solve for x
    x = 30,814,256,329,771,552/239,240,692.80
  6. Step 6: Final answer
    x = 128,800,230.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.