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Finding the Fourth Proportional to 77,277.40, 115,916.10 and 59,781.40

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Solution

The fourth proportional to 77,277.40, 115,916.10 and 59,781.40 is: 89,672.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,277.40 : 115,916.10 = 59,781.40 : x
  2. Step 2: Convert to fraction form
    77,277.40/115,916.10 = 59,781.40/x
  3. Step 3: Cross multiply
    77,277.40x = 115,916.10 × 59,781.40
  4. Step 4: Simplify right side
    77,277.40x = 6,929,626,740.54
  5. Step 5: Solve for x
    x = 6,929,626,740.54/77,277.40
  6. Step 6: Final answer
    x = 89,672.10

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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.