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Finding the Fourth Proportional to 152,428.92, 210,214.80 and 98,657.88

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Solution

The fourth proportional to 152,428.92, 210,214.80 and 98,657.88 is: 136,059.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,428.92 : 210,214.80 = 98,657.88 : x
  2. Step 2: Convert to fraction form
    152,428.92/210,214.80 = 98,657.88/x
  3. Step 3: Cross multiply
    152,428.92x = 210,214.80 × 98,657.88
  4. Step 4: Simplify right side
    152,428.92x = 20,739,346,512.62
  5. Step 5: Solve for x
    x = 20,739,346,512.62/152,428.92
  6. Step 6: Final answer
    x = 136,059.13

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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.