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Finding the Fourth Proportional to 96,390.40, 144,715.20 and 61,398.40

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Solution

The fourth proportional to 96,390.40, 144,715.20 and 61,398.40 is: 92,180.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,390.40 : 144,715.20 = 61,398.40 : x
  2. Step 2: Convert to fraction form
    96,390.40/144,715.20 = 61,398.40/x
  3. Step 3: Cross multiply
    96,390.40x = 144,715.20 × 61,398.40
  4. Step 4: Simplify right side
    96,390.40x = 8,885,281,735.68
  5. Step 5: Solve for x
    x = 8,885,281,735.68/96,390.40
  6. Step 6: Final answer
    x = 92,180.15

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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.