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Finding the Fourth Proportional to 144,421.70, 216,451.80 and 69,521.78

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Solution

The fourth proportional to 144,421.70, 216,451.80 and 69,521.78 is: 104,195.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,421.70 : 216,451.80 = 69,521.78 : x
  2. Step 2: Convert to fraction form
    144,421.70/216,451.80 = 69,521.78/x
  3. Step 3: Cross multiply
    144,421.70x = 216,451.80 × 69,521.78
  4. Step 4: Simplify right side
    144,421.70x = 15,048,114,420.20
  5. Step 5: Solve for x
    x = 15,048,114,420.20/144,421.70
  6. Step 6: Final answer
    x = 104,195.66

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1.5x scale

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.