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Finding the Fourth Proportional to 70,358.36, 105,509.19 and 25,366.91

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Solution

The fourth proportional to 70,358.36, 105,509.19 and 25,366.91 is: 38,040.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,358.36 : 105,509.19 = 25,366.91 : x
  2. Step 2: Convert to fraction form
    70,358.36/105,509.19 = 25,366.91/x
  3. Step 3: Cross multiply
    70,358.36x = 105,509.19 × 25,366.91
  4. Step 4: Simplify right side
    70,358.36x = 2,676,442,126.90
  5. Step 5: Solve for x
    x = 2,676,442,126.90/70,358.36
  6. Step 6: Final answer
    x = 38,040.14

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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.