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Finding the Fourth Proportional to 78,910, 108,899.04 and 45,376

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Solution

The fourth proportional to 78,910, 108,899.04 and 45,376 is: 62,620.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,910 : 108,899.04 = 45,376 : x
  2. Step 2: Convert to fraction form
    78,910/108,899.04 = 45,376/x
  3. Step 3: Cross multiply
    78,910x = 108,899.04 × 45,376
  4. Step 4: Simplify right side
    78,910x = 4,941,402,839.04
  5. Step 5: Solve for x
    x = 4,941,402,839.04/78,910
  6. Step 6: Final answer
    x = 62,620.74

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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.