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Finding the Fourth Proportional to 103,487.92, 142,802.58 and 63,211.48

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Solution

The fourth proportional to 103,487.92, 142,802.58 and 63,211.48 is: 87,225.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,487.92 : 142,802.58 = 63,211.48 : x
  2. Step 2: Convert to fraction form
    103,487.92/142,802.58 = 63,211.48/x
  3. Step 3: Cross multiply
    103,487.92x = 142,802.58 × 63,211.48
  4. Step 4: Simplify right side
    103,487.92x = 9,026,762,429.62
  5. Step 5: Solve for x
    x = 9,026,762,429.62/103,487.92
  6. Step 6: Final answer
    x = 87,225.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.