Home / 205,421.90-308,132.85-72,452.30

Finding the Fourth Proportional to 205,421.90, 308,132.85 and 72,452.30

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Solution

The fourth proportional to 205,421.90, 308,132.85 and 72,452.30 is: 108,678.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,421.90 : 308,132.85 = 72,452.30 : x
  2. Step 2: Convert to fraction form
    205,421.90/308,132.85 = 72,452.30/x
  3. Step 3: Cross multiply
    205,421.90x = 308,132.85 × 72,452.30
  4. Step 4: Simplify right side
    205,421.90x = 22,324,933,688.06
  5. Step 5: Solve for x
    x = 22,324,933,688.06/205,421.90
  6. Step 6: Final answer
    x = 108,678.45

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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.