Home / 421,276.80-631,895.76-105,726.72

Finding the Fourth Proportional to 421,276.80, 631,895.76 and 105,726.72

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Solution

The fourth proportional to 421,276.80, 631,895.76 and 105,726.72 is: 158,585.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,276.80 : 631,895.76 = 105,726.72 : x
  2. Step 2: Convert to fraction form
    421,276.80/631,895.76 = 105,726.72/x
  3. Step 3: Cross multiply
    421,276.80x = 631,895.76 × 105,726.72
  4. Step 4: Simplify right side
    421,276.80x = 66,808,266,086.71
  5. Step 5: Solve for x
    x = 66,808,266,086.71/421,276.80
  6. Step 6: Final answer
    x = 158,585.20

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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.