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Finding the Fourth Proportional to 125,762.81, 173,555.90 and 68,405.40

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Solution

The fourth proportional to 125,762.81, 173,555.90 and 68,405.40 is: 94,401.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,762.81 : 173,555.90 = 68,405.40 : x
  2. Step 2: Convert to fraction form
    125,762.81/173,555.90 = 68,405.40/x
  3. Step 3: Cross multiply
    125,762.81x = 173,555.90 × 68,405.40
  4. Step 4: Simplify right side
    125,762.81x = 11,872,160,419.83
  5. Step 5: Solve for x
    x = 11,872,160,419.83/125,762.81
  6. Step 6: Final answer
    x = 94,401.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.