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Finding the Fourth Proportional to 70,115.40, 105,201.90 and 25,763.40

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Solution

The fourth proportional to 70,115.40, 105,201.90 and 25,763.40 is: 38,655.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,115.40 : 105,201.90 = 25,763.40 : x
  2. Step 2: Convert to fraction form
    70,115.40/105,201.90 = 25,763.40/x
  3. Step 3: Cross multiply
    70,115.40x = 105,201.90 × 25,763.40
  4. Step 4: Simplify right side
    70,115.40x = 2,710,358,630.46
  5. Step 5: Solve for x
    x = 2,710,358,630.46/70,115.40
  6. Step 6: Final answer
    x = 38,655.68

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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.