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Finding the Fourth Proportional to 86,525.70, 129,715.65 and 44,972.70

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Solution

The fourth proportional to 86,525.70, 129,715.65 and 44,972.70 is: 67,421.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,525.70 : 129,715.65 = 44,972.70 : x
  2. Step 2: Convert to fraction form
    86,525.70/129,715.65 = 44,972.70/x
  3. Step 3: Cross multiply
    86,525.70x = 129,715.65 × 44,972.70
  4. Step 4: Simplify right side
    86,525.70x = 5,833,663,012.76
  5. Step 5: Solve for x
    x = 5,833,663,012.76/86,525.70
  6. Step 6: Final answer
    x = 67,421.16

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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.