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Finding the Fourth Proportional to 91,885.61, 126,801.65 and 51,602.90

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Solution

The fourth proportional to 91,885.61, 126,801.65 and 51,602.90 is: 71,211.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,885.61 : 126,801.65 = 51,602.90 : x
  2. Step 2: Convert to fraction form
    91,885.61/126,801.65 = 51,602.90/x
  3. Step 3: Cross multiply
    91,885.61x = 126,801.65 × 51,602.90
  4. Step 4: Simplify right side
    91,885.61x = 6,543,331,972.76
  5. Step 5: Solve for x
    x = 6,543,331,972.76/91,885.61
  6. Step 6: Final answer
    x = 71,211.72

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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.