Home / 121,421.90-182,132.85-81,764.30

Finding the Fourth Proportional to 121,421.90, 182,132.85 and 81,764.30

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Solution

The fourth proportional to 121,421.90, 182,132.85 and 81,764.30 is: 122,646.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,421.90 : 182,132.85 = 81,764.30 : x
  2. Step 2: Convert to fraction form
    121,421.90/182,132.85 = 81,764.30/x
  3. Step 3: Cross multiply
    121,421.90x = 182,132.85 × 81,764.30
  4. Step 4: Simplify right side
    121,421.90x = 14,891,964,987.26
  5. Step 5: Solve for x
    x = 14,891,964,987.26/121,421.90
  6. Step 6: Final answer
    x = 122,646.45

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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.