Home / 85,555.20-128,332.80-26,385.60

Finding the Fourth Proportional to 85,555.20, 128,332.80 and 26,385.60

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Solution

The fourth proportional to 85,555.20, 128,332.80 and 26,385.60 is: 39,578.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,555.20 : 128,332.80 = 26,385.60 : x
  2. Step 2: Convert to fraction form
    85,555.20/128,332.80 = 26,385.60/x
  3. Step 3: Cross multiply
    85,555.20x = 128,332.80 × 26,385.60
  4. Step 4: Simplify right side
    85,555.20x = 3,386,137,927.68
  5. Step 5: Solve for x
    x = 3,386,137,927.68/85,555.20
  6. Step 6: Final answer
    x = 39,578.40

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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.