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Finding the Fourth Proportional to 91,980.66, 137,901.01 and 47,579.14

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Solution

The fourth proportional to 91,980.66, 137,901.01 and 47,579.14 is: 71,332.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,980.66 : 137,901.01 = 47,579.14 : x
  2. Step 2: Convert to fraction form
    91,980.66/137,901.01 = 47,579.14/x
  3. Step 3: Cross multiply
    91,980.66x = 137,901.01 × 47,579.14
  4. Step 4: Simplify right side
    91,980.66x = 6,561,211,460.93
  5. Step 5: Solve for x
    x = 6,561,211,460.93/91,980.66
  6. Step 6: Final answer
    x = 71,332.51

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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.