Home / 102,874.08-142,046.76-78,962.88

Finding the Fourth Proportional to 102,874.08, 142,046.76 and 78,962.88

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Solution

The fourth proportional to 102,874.08, 142,046.76 and 78,962.88 is: 109,030.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,874.08 : 142,046.76 = 78,962.88 : x
  2. Step 2: Convert to fraction form
    102,874.08/142,046.76 = 78,962.88/x
  3. Step 3: Cross multiply
    102,874.08x = 142,046.76 × 78,962.88
  4. Step 4: Simplify right side
    102,874.08x = 11,216,421,264.27
  5. Step 5: Solve for x
    x = 11,216,421,264.27/102,874.08
  6. Step 6: Final answer
    x = 109,030.59

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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.