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Finding the Fourth Proportional to 103,630.60, 142,999.14 and 63,353.80

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Solution

The fourth proportional to 103,630.60, 142,999.14 and 63,353.80 is: 87,421.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,630.60 : 142,999.14 = 63,353.80 : x
  2. Step 2: Convert to fraction form
    103,630.60/142,999.14 = 63,353.80/x
  3. Step 3: Cross multiply
    103,630.60x = 142,999.14 × 63,353.80
  4. Step 4: Simplify right side
    103,630.60x = 9,059,538,915.73
  5. Step 5: Solve for x
    x = 9,059,538,915.73/103,630.60
  6. Step 6: Final answer
    x = 87,421.47

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1.5x scale

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.