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Finding the Fourth Proportional to 98,635.20, 148,111.20 and 91,358.40

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Solution

The fourth proportional to 98,635.20, 148,111.20 and 91,358.40 is: 137,184.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,635.20 : 148,111.20 = 91,358.40 : x
  2. Step 2: Convert to fraction form
    98,635.20/148,111.20 = 91,358.40/x
  3. Step 3: Cross multiply
    98,635.20x = 148,111.20 × 91,358.40
  4. Step 4: Simplify right side
    98,635.20x = 13,531,202,254.08
  5. Step 5: Solve for x
    x = 13,531,202,254.08/98,635.20
  6. Step 6: Final answer
    x = 137,184.31

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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.