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Finding the Fourth Proportional to 125,904.40, 189,002.40 and 76,040.80

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Solution

The fourth proportional to 125,904.40, 189,002.40 and 76,040.80 is: 114,149.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,904.40 : 189,002.40 = 76,040.80 : x
  2. Step 2: Convert to fraction form
    125,904.40/189,002.40 = 76,040.80/x
  3. Step 3: Cross multiply
    125,904.40x = 189,002.40 × 76,040.80
  4. Step 4: Simplify right side
    125,904.40x = 14,371,893,697.92
  5. Step 5: Solve for x
    x = 14,371,893,697.92/125,904.40
  6. Step 6: Final answer
    x = 114,149.26

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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.