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Finding the Fourth Proportional to 115,459.20, 173,188.80 and 76,060.80

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Solution

The fourth proportional to 115,459.20, 173,188.80 and 76,060.80 is: 114,091.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,459.20 : 173,188.80 = 76,060.80 : x
  2. Step 2: Convert to fraction form
    115,459.20/173,188.80 = 76,060.80/x
  3. Step 3: Cross multiply
    115,459.20x = 173,188.80 × 76,060.80
  4. Step 4: Simplify right side
    115,459.20x = 13,172,878,679.04
  5. Step 5: Solve for x
    x = 13,172,878,679.04/115,459.20
  6. Step 6: Final answer
    x = 114,091.20

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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.