Home / 129,592.07-178,815.36-72,218.80

Finding the Fourth Proportional to 129,592.07, 178,815.36 and 72,218.80

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Solution

The fourth proportional to 129,592.07, 178,815.36 and 72,218.80 is: 99,649.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,592.07 : 178,815.36 = 72,218.80 : x
  2. Step 2: Convert to fraction form
    129,592.07/178,815.36 = 72,218.80/x
  3. Step 3: Cross multiply
    129,592.07x = 178,815.36 × 72,218.80
  4. Step 4: Simplify right side
    129,592.07x = 12,913,830,720.77
  5. Step 5: Solve for x
    x = 12,913,830,720.77/129,592.07
  6. Step 6: Final answer
    x = 99,649.85

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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.