Home / 103,053.90-142,143.24-72,491.79

Finding the Fourth Proportional to 103,053.90, 142,143.24 and 72,491.79

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Solution

The fourth proportional to 103,053.90, 142,143.24 and 72,491.79 is: 99,988.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,053.90 : 142,143.24 = 72,491.79 : x
  2. Step 2: Convert to fraction form
    103,053.90/142,143.24 = 72,491.79/x
  3. Step 3: Cross multiply
    103,053.90x = 142,143.24 × 72,491.79
  4. Step 4: Simplify right side
    103,053.90x = 10,304,217,904.00
  5. Step 5: Solve for x
    x = 10,304,217,904.00/103,053.90
  6. Step 6: Final answer
    x = 99,988.63

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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.