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Finding the Fourth Proportional to 170,925.80, 256,388.70 and 121,062.20

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Solution

The fourth proportional to 170,925.80, 256,388.70 and 121,062.20 is: 181,593.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,925.80 : 256,388.70 = 121,062.20 : x
  2. Step 2: Convert to fraction form
    170,925.80/256,388.70 = 121,062.20/x
  3. Step 3: Cross multiply
    170,925.80x = 256,388.70 × 121,062.20
  4. Step 4: Simplify right side
    170,925.80x = 31,038,980,077.14
  5. Step 5: Solve for x
    x = 31,038,980,077.14/170,925.80
  6. Step 6: Final answer
    x = 181,593.30

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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.