Home / 78,005.90-117,008.85-69,841.10

Finding the Fourth Proportional to 78,005.90, 117,008.85 and 69,841.10

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Solution

The fourth proportional to 78,005.90, 117,008.85 and 69,841.10 is: 104,761.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,005.90 : 117,008.85 = 69,841.10 : x
  2. Step 2: Convert to fraction form
    78,005.90/117,008.85 = 69,841.10/x
  3. Step 3: Cross multiply
    78,005.90x = 117,008.85 × 69,841.10
  4. Step 4: Simplify right side
    78,005.90x = 8,172,026,793.74
  5. Step 5: Solve for x
    x = 8,172,026,793.74/78,005.90
  6. Step 6: Final answer
    x = 104,761.65

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1.5x scale

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.