Home / 129,479.18-178,681.56-72,118.04

Finding the Fourth Proportional to 129,479.18, 178,681.56 and 72,118.04

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Solution

The fourth proportional to 129,479.18, 178,681.56 and 72,118.04 is: 99,523.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,479.18 : 178,681.56 = 72,118.04 : x
  2. Step 2: Convert to fraction form
    129,479.18/178,681.56 = 72,118.04/x
  3. Step 3: Cross multiply
    129,479.18x = 178,681.56 × 72,118.04
  4. Step 4: Simplify right side
    129,479.18x = 12,886,163,891.34
  5. Step 5: Solve for x
    x = 12,886,163,891.34/129,479.18
  6. Step 6: Final answer
    x = 99,523.06

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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.