Home / 129,490.32-178,693.86-72,129.42

Finding the Fourth Proportional to 129,490.32, 178,693.86 and 72,129.42

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Solution

The fourth proportional to 129,490.32, 178,693.86 and 72,129.42 is: 99,537.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,490.32 : 178,693.86 = 72,129.42 : x
  2. Step 2: Convert to fraction form
    129,490.32/178,693.86 = 72,129.42/x
  3. Step 3: Cross multiply
    129,490.32x = 178,693.86 × 72,129.42
  4. Step 4: Simplify right side
    129,490.32x = 12,889,084,479.36
  5. Step 5: Solve for x
    x = 12,889,084,479.36/129,490.32
  6. Step 6: Final answer
    x = 99,537.05

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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.