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Finding the Fourth Proportional to 86,801.79, 129,992.40 and 60,072.87

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Solution

The fourth proportional to 86,801.79, 129,992.40 and 60,072.87 is: 89,963.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,801.79 : 129,992.40 = 60,072.87 : x
  2. Step 2: Convert to fraction form
    86,801.79/129,992.40 = 60,072.87/x
  3. Step 3: Cross multiply
    86,801.79x = 129,992.40 × 60,072.87
  4. Step 4: Simplify right side
    86,801.79x = 7,809,016,546.19
  5. Step 5: Solve for x
    x = 7,809,016,546.19/86,801.79
  6. Step 6: Final answer
    x = 89,963.77

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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.