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Finding the Fourth Proportional to 78,319.74, 108,001.80 and 67,026.72

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Solution

The fourth proportional to 78,319.74, 108,001.80 and 67,026.72 is: 92,428.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,319.74 : 108,001.80 = 67,026.72 : x
  2. Step 2: Convert to fraction form
    78,319.74/108,001.80 = 67,026.72/x
  3. Step 3: Cross multiply
    78,319.74x = 108,001.80 × 67,026.72
  4. Step 4: Simplify right side
    78,319.74x = 7,239,006,408.10
  5. Step 5: Solve for x
    x = 7,239,006,408.10/78,319.74
  6. Step 6: Final answer
    x = 92,428.89

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1.5x scale

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.