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Finding the Fourth Proportional to 79,908.76, 119,828.32 and 42,459.84

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Solution

The fourth proportional to 79,908.76, 119,828.32 and 42,459.84 is: 63,671.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,908.76 : 119,828.32 = 42,459.84 : x
  2. Step 2: Convert to fraction form
    79,908.76/119,828.32 = 42,459.84/x
  3. Step 3: Cross multiply
    79,908.76x = 119,828.32 × 42,459.84
  4. Step 4: Simplify right side
    79,908.76x = 5,087,891,294.67
  5. Step 5: Solve for x
    x = 5,087,891,294.67/79,908.76
  6. Step 6: Final answer
    x = 63,671.26

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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.