Home / 129,064.88-178,109.54-72,476.25

Finding the Fourth Proportional to 129,064.88, 178,109.54 and 72,476.25

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Solution

The fourth proportional to 129,064.88, 178,109.54 and 72,476.25 is: 100,017.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,064.88 : 178,109.54 = 72,476.25 : x
  2. Step 2: Convert to fraction form
    129,064.88/178,109.54 = 72,476.25/x
  3. Step 3: Cross multiply
    129,064.88x = 178,109.54 × 72,476.25
  4. Step 4: Simplify right side
    129,064.88x = 12,908,711,186.04
  5. Step 5: Solve for x
    x = 12,908,711,186.04/129,064.88
  6. Step 6: Final answer
    x = 100,017.23

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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.