Home / 129,386.76-178,553.37-72,798.18

Finding the Fourth Proportional to 129,386.76, 178,553.37 and 72,798.18

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Solution

The fourth proportional to 129,386.76, 178,553.37 and 72,798.18 is: 100,461.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,386.76 : 178,553.37 = 72,798.18 : x
  2. Step 2: Convert to fraction form
    129,386.76/178,553.37 = 72,798.18/x
  3. Step 3: Cross multiply
    129,386.76x = 178,553.37 × 72,798.18
  4. Step 4: Simplify right side
    129,386.76x = 12,998,360,368.87
  5. Step 5: Solve for x
    x = 12,998,360,368.87/129,386.76
  6. Step 6: Final answer
    x = 100,461.29

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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.