Home / 129,192.67-178,264.29-71,830.40

Finding the Fourth Proportional to 129,192.67, 178,264.29 and 71,830.40

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Solution

The fourth proportional to 129,192.67, 178,264.29 and 71,830.40 is: 99,113.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,192.67 : 178,264.29 = 71,830.40 : x
  2. Step 2: Convert to fraction form
    129,192.67/178,264.29 = 71,830.40/x
  3. Step 3: Cross multiply
    129,192.67x = 178,264.29 × 71,830.40
  4. Step 4: Simplify right side
    129,192.67x = 12,804,794,634.46
  5. Step 5: Solve for x
    x = 12,804,794,634.46/129,192.67
  6. Step 6: Final answer
    x = 99,113.94

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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.