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Finding the Fourth Proportional to 98,560.71, 147,946.28 and 42,428.61

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Solution

The fourth proportional to 98,560.71, 147,946.28 and 42,428.61 is: 63,688.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,560.71 : 147,946.28 = 42,428.61 : x
  2. Step 2: Convert to fraction form
    98,560.71/147,946.28 = 42,428.61/x
  3. Step 3: Cross multiply
    98,560.71x = 147,946.28 × 42,428.61
  4. Step 4: Simplify right side
    98,560.71x = 6,277,154,802.93
  5. Step 5: Solve for x
    x = 6,277,154,802.93/98,560.71
  6. Step 6: Final answer
    x = 63,688.21

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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.