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Finding the Fourth Proportional to 91,809.07, 137,713.35 and 51,809.87

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Solution

The fourth proportional to 91,809.07, 137,713.35 and 51,809.87 is: 77,714.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,809.07 : 137,713.35 = 51,809.87 : x
  2. Step 2: Convert to fraction form
    91,809.07/137,713.35 = 51,809.87/x
  3. Step 3: Cross multiply
    91,809.07x = 137,713.35 × 51,809.87
  4. Step 4: Simplify right side
    91,809.07x = 7,134,910,760.76
  5. Step 5: Solve for x
    x = 7,134,910,760.76/91,809.07
  6. Step 6: Final answer
    x = 77,714.66

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1.5x scale

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.