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Finding the Fourth Proportional to 98,853.90, 136,418.12 and 53,531.88

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Solution

The fourth proportional to 98,853.90, 136,418.12 and 53,531.88 is: 73,873.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,853.90 : 136,418.12 = 53,531.88 : x
  2. Step 2: Convert to fraction form
    98,853.90/136,418.12 = 53,531.88/x
  3. Step 3: Cross multiply
    98,853.90x = 136,418.12 × 53,531.88
  4. Step 4: Simplify right side
    98,853.90x = 7,302,718,429.67
  5. Step 5: Solve for x
    x = 7,302,718,429.67/98,853.90
  6. Step 6: Final answer
    x = 73,873.85

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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.