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Finding the Fourth Proportional to 98,877.74, 136,459.71 and 55,865.12

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Solution

The fourth proportional to 98,877.74, 136,459.71 and 55,865.12 is: 77,098.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,877.74 : 136,459.71 = 55,865.12 : x
  2. Step 2: Convert to fraction form
    98,877.74/136,459.71 = 55,865.12/x
  3. Step 3: Cross multiply
    98,877.74x = 136,459.71 × 55,865.12
  4. Step 4: Simplify right side
    98,877.74x = 7,623,337,392.02
  5. Step 5: Solve for x
    x = 7,623,337,392.02/98,877.74
  6. Step 6: Final answer
    x = 77,098.62

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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.