Home / 128,239.20-176,979.25-70,877.28

Finding the Fourth Proportional to 128,239.20, 176,979.25 and 70,877.28

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Solution

The fourth proportional to 128,239.20, 176,979.25 and 70,877.28 is: 97,815.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,239.20 : 176,979.25 = 70,877.28 : x
  2. Step 2: Convert to fraction form
    128,239.20/176,979.25 = 70,877.28/x
  3. Step 3: Cross multiply
    128,239.20x = 176,979.25 × 70,877.28
  4. Step 4: Simplify right side
    128,239.20x = 12,543,808,298.89
  5. Step 5: Solve for x
    x = 12,543,808,298.89/128,239.20
  6. Step 6: Final answer
    x = 97,815.71

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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.