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Finding the Fourth Proportional to 86,029,422.40, 128,894,834.40 and 72,592,494.40

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Solution

The fourth proportional to 86,029,422.40, 128,894,834.40 and 72,592,494.40 is: 108,762,761.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,029,422.40 : 128,894,834.40 = 72,592,494.40 : x
  2. Step 2: Convert to fraction form
    86,029,422.40/128,894,834.40 = 72,592,494.40/x
  3. Step 3: Cross multiply
    86,029,422.40x = 128,894,834.40 × 72,592,494.40
  4. Step 4: Simplify right side
    86,029,422.40x = 9,356,797,544,370,928
  5. Step 5: Solve for x
    x = 9,356,797,544,370,928/86,029,422.40
  6. Step 6: Final answer
    x = 108,762,761.43

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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.