Home / 65,685.12-90,612.99-38,814.63

Finding the Fourth Proportional to 65,685.12, 90,612.99 and 38,814.63

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Solution

The fourth proportional to 65,685.12, 90,612.99 and 38,814.63 is: 53,545.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,685.12 : 90,612.99 = 38,814.63 : x
  2. Step 2: Convert to fraction form
    65,685.12/90,612.99 = 38,814.63/x
  3. Step 3: Cross multiply
    65,685.12x = 90,612.99 × 38,814.63
  4. Step 4: Simplify right side
    65,685.12x = 3,517,109,680.04
  5. Step 5: Solve for x
    x = 3,517,109,680.04/65,685.12
  6. Step 6: Final answer
    x = 53,545.00

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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.