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Finding the Fourth Proportional to 127,378.57, 175,478.61 and 89,066.42

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Solution

The fourth proportional to 127,378.57, 175,478.61 and 89,066.42 is: 122,699.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,378.57 : 175,478.61 = 89,066.42 : x
  2. Step 2: Convert to fraction form
    127,378.57/175,478.61 = 89,066.42/x
  3. Step 3: Cross multiply
    127,378.57x = 175,478.61 × 89,066.42
  4. Step 4: Simplify right side
    127,378.57x = 15,629,251,579.28
  5. Step 5: Solve for x
    x = 15,629,251,579.28/127,378.57
  6. Step 6: Final answer
    x = 122,699.22

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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.