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Finding the Fourth Proportional to 143,125.80, 214,688.70 and 137,220.90

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Solution

The fourth proportional to 143,125.80, 214,688.70 and 137,220.90 is: 205,831.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,125.80 : 214,688.70 = 137,220.90 : x
  2. Step 2: Convert to fraction form
    143,125.80/214,688.70 = 137,220.90/x
  3. Step 3: Cross multiply
    143,125.80x = 214,688.70 × 137,220.90
  4. Step 4: Simplify right side
    143,125.80x = 29,459,776,633.83
  5. Step 5: Solve for x
    x = 29,459,776,633.83/143,125.80
  6. Step 6: Final answer
    x = 205,831.35

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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.