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Finding the Fourth Proportional to 98,462.40, 147,693.60 and 90,859.20

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Solution

The fourth proportional to 98,462.40, 147,693.60 and 90,859.20 is: 136,288.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,462.40 : 147,693.60 = 90,859.20 : x
  2. Step 2: Convert to fraction form
    98,462.40/147,693.60 = 90,859.20/x
  3. Step 3: Cross multiply
    98,462.40x = 147,693.60 × 90,859.20
  4. Step 4: Simplify right side
    98,462.40x = 13,419,322,341.12
  5. Step 5: Solve for x
    x = 13,419,322,341.12/98,462.40
  6. Step 6: Final answer
    x = 136,288.80

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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.