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Finding the Fourth Proportional to 98,759.76, 148,754.75 and 91,830.71

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Solution

The fourth proportional to 98,759.76, 148,754.75 and 91,830.71 is: 138,318.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,759.76 : 148,754.75 = 91,830.71 : x
  2. Step 2: Convert to fraction form
    98,759.76/148,754.75 = 91,830.71/x
  3. Step 3: Cross multiply
    98,759.76x = 148,754.75 × 91,830.71
  4. Step 4: Simplify right side
    98,759.76x = 13,660,254,221.11
  5. Step 5: Solve for x
    x = 13,660,254,221.11/98,759.76
  6. Step 6: Final answer
    x = 138,318.02

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.