Home / 45,134.22-67,740.21-21,780.30

Finding the Fourth Proportional to 45,134.22, 67,740.21 and 21,780.30

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Solution

The fourth proportional to 45,134.22, 67,740.21 and 21,780.30 is: 32,689.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,134.22 : 67,740.21 = 21,780.30 : x
  2. Step 2: Convert to fraction form
    45,134.22/67,740.21 = 21,780.30/x
  3. Step 3: Cross multiply
    45,134.22x = 67,740.21 × 21,780.30
  4. Step 4: Simplify right side
    45,134.22x = 1,475,402,095.86
  5. Step 5: Solve for x
    x = 1,475,402,095.86/45,134.22
  6. Step 6: Final answer
    x = 32,689.21

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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.