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Finding the Fourth Proportional to 86,545.84, 129,834.56 and 39,797.50

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Solution

The fourth proportional to 86,545.84, 129,834.56 and 39,797.50 is: 59,703.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,545.84 : 129,834.56 = 39,797.50 : x
  2. Step 2: Convert to fraction form
    86,545.84/129,834.56 = 39,797.50/x
  3. Step 3: Cross multiply
    86,545.84x = 129,834.56 × 39,797.50
  4. Step 4: Simplify right side
    86,545.84x = 5,167,090,901.60
  5. Step 5: Solve for x
    x = 5,167,090,901.60/86,545.84
  6. Step 6: Final answer
    x = 59,703.52

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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.