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Finding the Fourth Proportional to 45,312.80, 67,969.20 and 43,125.80

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Solution

The fourth proportional to 45,312.80, 67,969.20 and 43,125.80 is: 64,688.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,312.80 : 67,969.20 = 43,125.80 : x
  2. Step 2: Convert to fraction form
    45,312.80/67,969.20 = 43,125.80/x
  3. Step 3: Cross multiply
    45,312.80x = 67,969.20 × 43,125.80
  4. Step 4: Simplify right side
    45,312.80x = 2,931,226,125.36
  5. Step 5: Solve for x
    x = 2,931,226,125.36/45,312.80
  6. Step 6: Final answer
    x = 64,688.70

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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.