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Finding the Fourth Proportional to 143,807.80, 215,549.70 and 68,963.80

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Solution

The fourth proportional to 143,807.80, 215,549.70 and 68,963.80 is: 103,368.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,807.80 : 215,549.70 = 68,963.80 : x
  2. Step 2: Convert to fraction form
    143,807.80/215,549.70 = 68,963.80/x
  3. Step 3: Cross multiply
    143,807.80x = 215,549.70 × 68,963.80
  4. Step 4: Simplify right side
    143,807.80x = 14,865,126,400.86
  5. Step 5: Solve for x
    x = 14,865,126,400.86/143,807.80
  6. Step 6: Final answer
    x = 103,368.01

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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.