Home / 129,177.25-178,281.31-72,588.63

Finding the Fourth Proportional to 129,177.25, 178,281.31 and 72,588.63

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Solution

The fourth proportional to 129,177.25, 178,281.31 and 72,588.63 is: 100,181.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,177.25 : 178,281.31 = 72,588.63 : x
  2. Step 2: Convert to fraction form
    129,177.25/178,281.31 = 72,588.63/x
  3. Step 3: Cross multiply
    129,177.25x = 178,281.31 × 72,588.63
  4. Step 4: Simplify right side
    129,177.25x = 12,941,196,047.51
  5. Step 5: Solve for x
    x = 12,941,196,047.51/129,177.25
  6. Step 6: Final answer
    x = 100,181.70

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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.