Home / 81,231.18-112,103.40-45,421.08

Finding the Fourth Proportional to 81,231.18, 112,103.40 and 45,421.08

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Solution

The fourth proportional to 81,231.18, 112,103.40 and 45,421.08 is: 62,683.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,231.18 : 112,103.40 = 45,421.08 : x
  2. Step 2: Convert to fraction form
    81,231.18/112,103.40 = 45,421.08/x
  3. Step 3: Cross multiply
    81,231.18x = 112,103.40 × 45,421.08
  4. Step 4: Simplify right side
    81,231.18x = 5,091,857,499.67
  5. Step 5: Solve for x
    x = 5,091,857,499.67/81,231.18
  6. Step 6: Final answer
    x = 62,683.53

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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.