Home / 420,785.24-631,177.95-105,242.18

Finding the Fourth Proportional to 420,785.24, 631,177.95 and 105,242.18

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Solution

The fourth proportional to 420,785.24, 631,177.95 and 105,242.18 is: 157,863.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,785.24 : 631,177.95 = 105,242.18 : x
  2. Step 2: Convert to fraction form
    420,785.24/631,177.95 = 105,242.18/x
  3. Step 3: Cross multiply
    420,785.24x = 631,177.95 × 105,242.18
  4. Step 4: Simplify right side
    420,785.24x = 66,426,543,425.93
  5. Step 5: Solve for x
    x = 66,426,543,425.93/420,785.24
  6. Step 6: Final answer
    x = 157,863.29

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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.