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Finding the Fourth Proportional to 143,988.32, 216,048.12 and 73,916.88

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Solution

The fourth proportional to 143,988.32, 216,048.12 and 73,916.88 is: 110,909.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,988.32 : 216,048.12 = 73,916.88 : x
  2. Step 2: Convert to fraction form
    143,988.32/216,048.12 = 73,916.88/x
  3. Step 3: Cross multiply
    143,988.32x = 216,048.12 × 73,916.88
  4. Step 4: Simplify right side
    143,988.32x = 15,969,602,960.27
  5. Step 5: Solve for x
    x = 15,969,602,960.27/143,988.32
  6. Step 6: Final answer
    x = 110,909.02

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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.