Home / 129,095.74-178,202.91-81,340.21

Finding the Fourth Proportional to 129,095.74, 178,202.91 and 81,340.21

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Solution

The fourth proportional to 129,095.74, 178,202.91 and 81,340.21 is: 112,281.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,095.74 : 178,202.91 = 81,340.21 : x
  2. Step 2: Convert to fraction form
    129,095.74/178,202.91 = 81,340.21/x
  3. Step 3: Cross multiply
    129,095.74x = 178,202.91 × 81,340.21
  4. Step 4: Simplify right side
    129,095.74x = 14,495,062,122.01
  5. Step 5: Solve for x
    x = 14,495,062,122.01/129,095.74
  6. Step 6: Final answer
    x = 112,281.49

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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.