Home / 100,132.58-138,182.28-57,690.20

Finding the Fourth Proportional to 100,132.58, 138,182.28 and 57,690.20

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Solution

The fourth proportional to 100,132.58, 138,182.28 and 57,690.20 is: 79,612.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,132.58 : 138,182.28 = 57,690.20 : x
  2. Step 2: Convert to fraction form
    100,132.58/138,182.28 = 57,690.20/x
  3. Step 3: Cross multiply
    100,132.58x = 138,182.28 × 57,690.20
  4. Step 4: Simplify right side
    100,132.58x = 7,971,763,369.66
  5. Step 5: Solve for x
    x = 7,971,763,369.66/100,132.58
  6. Step 6: Final answer
    x = 79,612.08

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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.