Home / 100,864.20-139,210.74-58,446.12

Finding the Fourth Proportional to 100,864.20, 139,210.74 and 58,446.12

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Solution

The fourth proportional to 100,864.20, 139,210.74 and 58,446.12 is: 80,666.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,864.20 : 139,210.74 = 58,446.12 : x
  2. Step 2: Convert to fraction form
    100,864.20/139,210.74 = 58,446.12/x
  3. Step 3: Cross multiply
    100,864.20x = 139,210.74 × 58,446.12
  4. Step 4: Simplify right side
    100,864.20x = 8,136,327,615.33
  5. Step 5: Solve for x
    x = 8,136,327,615.33/100,864.20
  6. Step 6: Final answer
    x = 80,666.16

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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.