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Finding the Fourth Proportional to 154,656.68, 213,416.12 and 90,982.18

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Solution

The fourth proportional to 154,656.68, 213,416.12 and 90,982.18 is: 125,549.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,656.68 : 213,416.12 = 90,982.18 : x
  2. Step 2: Convert to fraction form
    154,656.68/213,416.12 = 90,982.18/x
  3. Step 3: Cross multiply
    154,656.68x = 213,416.12 × 90,982.18
  4. Step 4: Simplify right side
    154,656.68x = 19,417,063,844.74
  5. Step 5: Solve for x
    x = 19,417,063,844.74/154,656.68
  6. Step 6: Final answer
    x = 125,549.47

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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.