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Finding the Fourth Proportional to 98,841.96, 148,984.74 and 90,426.87

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Solution

The fourth proportional to 98,841.96, 148,984.74 and 90,426.87 is: 136,300.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,841.96 : 148,984.74 = 90,426.87 : x
  2. Step 2: Convert to fraction form
    98,841.96/148,984.74 = 90,426.87/x
  3. Step 3: Cross multiply
    98,841.96x = 148,984.74 × 90,426.87
  4. Step 4: Simplify right side
    98,841.96x = 13,472,223,715.96
  5. Step 5: Solve for x
    x = 13,472,223,715.96/98,841.96
  6. Step 6: Final answer
    x = 136,300.65

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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.