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Finding the Fourth Proportional to 100,814.91, 151,120.71 and 63,401.72

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Solution

The fourth proportional to 100,814.91, 151,120.71 and 63,401.72 is: 95,038.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,814.91 : 151,120.71 = 63,401.72 : x
  2. Step 2: Convert to fraction form
    100,814.91/151,120.71 = 63,401.72/x
  3. Step 3: Cross multiply
    100,814.91x = 151,120.71 × 63,401.72
  4. Step 4: Simplify right side
    100,814.91x = 9,581,312,186.02
  5. Step 5: Solve for x
    x = 9,581,312,186.02/100,814.91
  6. Step 6: Final answer
    x = 95,038.64

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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.