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Finding the Fourth Proportional to 91,251.63, 136,686.76 and 73,385.66

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Solution

The fourth proportional to 91,251.63, 136,686.76 and 73,385.66 is: 109,925.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,251.63 : 136,686.76 = 73,385.66 : x
  2. Step 2: Convert to fraction form
    91,251.63/136,686.76 = 73,385.66/x
  3. Step 3: Cross multiply
    91,251.63x = 136,686.76 × 73,385.66
  4. Step 4: Simplify right side
    91,251.63x = 10,030,848,254.11
  5. Step 5: Solve for x
    x = 10,030,848,254.11/91,251.63
  6. Step 6: Final answer
    x = 109,925.14

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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.