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Finding the Fourth Proportional to 86,656.51, 129,989.40 and 24,331.87

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Solution

The fourth proportional to 86,656.51, 129,989.40 and 24,331.87 is: 36,499.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,656.51 : 129,989.40 = 24,331.87 : x
  2. Step 2: Convert to fraction form
    86,656.51/129,989.40 = 24,331.87/x
  3. Step 3: Cross multiply
    86,656.51x = 129,989.40 × 24,331.87
  4. Step 4: Simplify right side
    86,656.51x = 3,162,885,182.18
  5. Step 5: Solve for x
    x = 3,162,885,182.18/86,656.51
  6. Step 6: Final answer
    x = 36,499.11

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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.