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Finding the Fourth Proportional to 316,510.85, 474,764.22 and 79,853.76

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Solution

The fourth proportional to 316,510.85, 474,764.22 and 79,853.76 is: 119,780.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,510.85 : 474,764.22 = 79,853.76 : x
  2. Step 2: Convert to fraction form
    316,510.85/474,764.22 = 79,853.76/x
  3. Step 3: Cross multiply
    316,510.85x = 474,764.22 × 79,853.76
  4. Step 4: Simplify right side
    316,510.85x = 37,911,708,080.47
  5. Step 5: Solve for x
    x = 37,911,708,080.47/316,510.85
  6. Step 6: Final answer
    x = 119,780.12

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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.