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Finding the Fourth Proportional to 99,898.90, 137,869.98 and 54,583.69

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Solution

The fourth proportional to 99,898.90, 137,869.98 and 54,583.69 is: 75,330.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,898.90 : 137,869.98 = 54,583.69 : x
  2. Step 2: Convert to fraction form
    99,898.90/137,869.98 = 54,583.69/x
  3. Step 3: Cross multiply
    99,898.90x = 137,869.98 × 54,583.69
  4. Step 4: Simplify right side
    99,898.90x = 7,525,452,248.63
  5. Step 5: Solve for x
    x = 7,525,452,248.63/99,898.90
  6. Step 6: Final answer
    x = 75,330.68

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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.