Home / 129,012.66-178,036.76-72,424.02

Finding the Fourth Proportional to 129,012.66, 178,036.76 and 72,424.02

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Solution

The fourth proportional to 129,012.66, 178,036.76 and 72,424.02 is: 99,944.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,012.66 : 178,036.76 = 72,424.02 : x
  2. Step 2: Convert to fraction form
    129,012.66/178,036.76 = 72,424.02/x
  3. Step 3: Cross multiply
    129,012.66x = 178,036.76 × 72,424.02
  4. Step 4: Simplify right side
    129,012.66x = 12,894,137,866.98
  5. Step 5: Solve for x
    x = 12,894,137,866.98/129,012.66
  6. Step 6: Final answer
    x = 99,944.75

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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.