Home / 42,949.70-64,315.20-40,981.40

Finding the Fourth Proportional to 42,949.70, 64,315.20 and 40,981.40

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Solution

The fourth proportional to 42,949.70, 64,315.20 and 40,981.40 is: 61,367.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,949.70 : 64,315.20 = 40,981.40 : x
  2. Step 2: Convert to fraction form
    42,949.70/64,315.20 = 40,981.40/x
  3. Step 3: Cross multiply
    42,949.70x = 64,315.20 × 40,981.40
  4. Step 4: Simplify right side
    42,949.70x = 2,635,726,937.28
  5. Step 5: Solve for x
    x = 2,635,726,937.28/42,949.70
  6. Step 6: Final answer
    x = 61,367.76

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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.