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Finding the Fourth Proportional to 99,889.55, 137,851.76 and 57,448.11

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Solution

The fourth proportional to 99,889.55, 137,851.76 and 57,448.11 is: 79,280.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,889.55 : 137,851.76 = 57,448.11 : x
  2. Step 2: Convert to fraction form
    99,889.55/137,851.76 = 57,448.11/x
  3. Step 3: Cross multiply
    99,889.55x = 137,851.76 × 57,448.11
  4. Step 4: Simplify right side
    99,889.55x = 7,919,323,072.17
  5. Step 5: Solve for x
    x = 7,919,323,072.17/99,889.55
  6. Step 6: Final answer
    x = 79,280.80

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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.