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Finding the Fourth Proportional to 113,792.80, 170,689.20 and 78,363.40

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Solution

The fourth proportional to 113,792.80, 170,689.20 and 78,363.40 is: 117,545.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,792.80 : 170,689.20 = 78,363.40 : x
  2. Step 2: Convert to fraction form
    113,792.80/170,689.20 = 78,363.40/x
  3. Step 3: Cross multiply
    113,792.80x = 170,689.20 × 78,363.40
  4. Step 4: Simplify right side
    113,792.80x = 13,375,786,055.28
  5. Step 5: Solve for x
    x = 13,375,786,055.28/113,792.80
  6. Step 6: Final answer
    x = 117,545.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.