Home / 129,012.06-178,036.62-72,423.38

Finding the Fourth Proportional to 129,012.06, 178,036.62 and 72,423.38

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Solution

The fourth proportional to 129,012.06, 178,036.62 and 72,423.38 is: 99,944.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,012.06 : 178,036.62 = 72,423.38 : x
  2. Step 2: Convert to fraction form
    129,012.06/178,036.62 = 72,423.38/x
  3. Step 3: Cross multiply
    129,012.06x = 178,036.62 × 72,423.38
  4. Step 4: Simplify right side
    129,012.06x = 12,894,013,784.18
  5. Step 5: Solve for x
    x = 12,894,013,784.18/129,012.06
  6. Step 6: Final answer
    x = 99,944.25

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1.5x scale

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.