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Finding the Fourth Proportional to 356,708.40, 535,061.88 and 86,834.40

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Solution

The fourth proportional to 356,708.40, 535,061.88 and 86,834.40 is: 130,251.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,708.40 : 535,061.88 = 86,834.40 : x
  2. Step 2: Convert to fraction form
    356,708.40/535,061.88 = 86,834.40/x
  3. Step 3: Cross multiply
    356,708.40x = 535,061.88 × 86,834.40
  4. Step 4: Simplify right side
    356,708.40x = 46,461,777,312.67
  5. Step 5: Solve for x
    x = 46,461,777,312.67/356,708.40
  6. Step 6: Final answer
    x = 130,251.42

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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.