Home / 157,423.16-217,121.10-100,839.80

Finding the Fourth Proportional to 157,423.16, 217,121.10 and 100,839.80

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Solution

The fourth proportional to 157,423.16, 217,121.10 and 100,839.80 is: 139,080.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,423.16 : 217,121.10 = 100,839.80 : x
  2. Step 2: Convert to fraction form
    157,423.16/217,121.10 = 100,839.80/x
  3. Step 3: Cross multiply
    157,423.16x = 217,121.10 × 100,839.80
  4. Step 4: Simplify right side
    157,423.16x = 21,894,448,299.78
  5. Step 5: Solve for x
    x = 21,894,448,299.78/157,423.16
  6. Step 6: Final answer
    x = 139,080.22

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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.