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Finding the Fourth Proportional to 91,602.76, 137,423.73 and 28,421.52

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Solution

The fourth proportional to 91,602.76, 137,423.73 and 28,421.52 is: 42,638.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,602.76 : 137,423.73 = 28,421.52 : x
  2. Step 2: Convert to fraction form
    91,602.76/137,423.73 = 28,421.52/x
  3. Step 3: Cross multiply
    91,602.76x = 137,423.73 × 28,421.52
  4. Step 4: Simplify right side
    91,602.76x = 3,905,791,290.67
  5. Step 5: Solve for x
    x = 3,905,791,290.67/91,602.76
  6. Step 6: Final answer
    x = 42,638.36

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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.