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Finding the Fourth Proportional to 144,778.01, 216,871.36 and 74,509.70

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Solution

The fourth proportional to 144,778.01, 216,871.36 and 74,509.70 is: 111,612.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,778.01 : 216,871.36 = 74,509.70 : x
  2. Step 2: Convert to fraction form
    144,778.01/216,871.36 = 74,509.70/x
  3. Step 3: Cross multiply
    144,778.01x = 216,871.36 × 74,509.70
  4. Step 4: Simplify right side
    144,778.01x = 16,159,018,701.56
  5. Step 5: Solve for x
    x = 16,159,018,701.56/144,778.01
  6. Step 6: Final answer
    x = 111,612.39

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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.