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Finding the Fourth Proportional to 121,490.40, 182,170.80 and 51,290.40

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Solution

The fourth proportional to 121,490.40, 182,170.80 and 51,290.40 is: 76,908.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,490.40 : 182,170.80 = 51,290.40 : x
  2. Step 2: Convert to fraction form
    121,490.40/182,170.80 = 51,290.40/x
  3. Step 3: Cross multiply
    121,490.40x = 182,170.80 × 51,290.40
  4. Step 4: Simplify right side
    121,490.40x = 9,343,613,200.32
  5. Step 5: Solve for x
    x = 9,343,613,200.32/121,490.40
  6. Step 6: Final answer
    x = 76,908.24

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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.