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Finding the Fourth Proportional to 86,564.67, 129,870.90 and 36,618.45

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Solution

The fourth proportional to 86,564.67, 129,870.90 and 36,618.45 is: 54,937.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,564.67 : 129,870.90 = 36,618.45 : x
  2. Step 2: Convert to fraction form
    86,564.67/129,870.90 = 36,618.45/x
  3. Step 3: Cross multiply
    86,564.67x = 129,870.90 × 36,618.45
  4. Step 4: Simplify right side
    86,564.67x = 4,755,671,058.11
  5. Step 5: Solve for x
    x = 4,755,671,058.11/86,564.67
  6. Step 6: Final answer
    x = 54,937.78

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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.