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Finding the Fourth Proportional to 115,411.20, 173,116.80 and 76,012.80

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Solution

The fourth proportional to 115,411.20, 173,116.80 and 76,012.80 is: 114,019.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,411.20 : 173,116.80 = 76,012.80 : x
  2. Step 2: Convert to fraction form
    115,411.20/173,116.80 = 76,012.80/x
  3. Step 3: Cross multiply
    115,411.20x = 173,116.80 × 76,012.80
  4. Step 4: Simplify right side
    115,411.20x = 13,159,092,695.04
  5. Step 5: Solve for x
    x = 13,159,092,695.04/115,411.20
  6. Step 6: Final answer
    x = 114,019.20

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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.