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Finding the Fourth Proportional to 98,624.88, 135,929.88 and 71,400.24

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Solution

The fourth proportional to 98,624.88, 135,929.88 and 71,400.24 is: 98,407.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,624.88 : 135,929.88 = 71,400.24 : x
  2. Step 2: Convert to fraction form
    98,624.88/135,929.88 = 71,400.24/x
  3. Step 3: Cross multiply
    98,624.88x = 135,929.88 × 71,400.24
  4. Step 4: Simplify right side
    98,624.88x = 9,705,426,055.17
  5. Step 5: Solve for x
    x = 9,705,426,055.17/98,624.88
  6. Step 6: Final answer
    x = 98,407.48

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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.