Home / 99,985.78-137,984.06-54,666.78

Finding the Fourth Proportional to 99,985.78, 137,984.06 and 54,666.78

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Solution

The fourth proportional to 99,985.78, 137,984.06 and 54,666.78 is: 75,442.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,985.78 : 137,984.06 = 54,666.78 : x
  2. Step 2: Convert to fraction form
    99,985.78/137,984.06 = 54,666.78/x
  3. Step 3: Cross multiply
    99,985.78x = 137,984.06 × 54,666.78
  4. Step 4: Simplify right side
    99,985.78x = 7,543,144,251.53
  5. Step 5: Solve for x
    x = 7,543,144,251.53/99,985.78
  6. Step 6: Final answer
    x = 75,442.17

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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.