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Finding the Fourth Proportional to 51,618.40, 77,312.40 and 42,402.40

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Solution

The fourth proportional to 51,618.40, 77,312.40 and 42,402.40 is: 63,508.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,618.40 : 77,312.40 = 42,402.40 : x
  2. Step 2: Convert to fraction form
    51,618.40/77,312.40 = 42,402.40/x
  3. Step 3: Cross multiply
    51,618.40x = 77,312.40 × 42,402.40
  4. Step 4: Simplify right side
    51,618.40x = 3,278,231,309.76
  5. Step 5: Solve for x
    x = 3,278,231,309.76/51,618.40
  6. Step 6: Final answer
    x = 63,508.97

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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.