Home / 100,820.51-139,125.15-59,982.38

Finding the Fourth Proportional to 100,820.51, 139,125.15 and 59,982.38

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Solution

The fourth proportional to 100,820.51, 139,125.15 and 59,982.38 is: 82,771.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,820.51 : 139,125.15 = 59,982.38 : x
  2. Step 2: Convert to fraction form
    100,820.51/139,125.15 = 59,982.38/x
  3. Step 3: Cross multiply
    100,820.51x = 139,125.15 × 59,982.38
  4. Step 4: Simplify right side
    100,820.51x = 8,345,057,614.86
  5. Step 5: Solve for x
    x = 8,345,057,614.86/100,820.51
  6. Step 6: Final answer
    x = 82,771.43

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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.