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Finding the Fourth Proportional to 103,486.92, 142,801.20 and 63,210.48

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Solution

The fourth proportional to 103,486.92, 142,801.20 and 63,210.48 is: 87,223.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,486.92 : 142,801.20 = 63,210.48 : x
  2. Step 2: Convert to fraction form
    103,486.92/142,801.20 = 63,210.48/x
  3. Step 3: Cross multiply
    103,486.92x = 142,801.20 × 63,210.48
  4. Step 4: Simplify right side
    103,486.92x = 9,026,532,396.58
  5. Step 5: Solve for x
    x = 9,026,532,396.58/103,486.92
  6. Step 6: Final answer
    x = 87,223.90

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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.