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Finding the Fourth Proportional to 79,655.68, 109,920 and 46,115.20

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Solution

The fourth proportional to 79,655.68, 109,920 and 46,115.20 is: 63,636.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,655.68 : 109,920 = 46,115.20 : x
  2. Step 2: Convert to fraction form
    79,655.68/109,920 = 46,115.20/x
  3. Step 3: Cross multiply
    79,655.68x = 109,920 × 46,115.20
  4. Step 4: Simplify right side
    79,655.68x = 5,068,982,784
  5. Step 5: Solve for x
    x = 5,068,982,784/79,655.68
  6. Step 6: Final answer
    x = 63,636.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.