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Finding the Fourth Proportional to 70,506.76, 105,619.14 and 42,411.28

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Solution

The fourth proportional to 70,506.76, 105,619.14 and 42,411.28 is: 63,532.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,506.76 : 105,619.14 = 42,411.28 : x
  2. Step 2: Convert to fraction form
    70,506.76/105,619.14 = 42,411.28/x
  3. Step 3: Cross multiply
    70,506.76x = 105,619.14 × 42,411.28
  4. Step 4: Simplify right side
    70,506.76x = 4,479,442,919.90
  5. Step 5: Solve for x
    x = 4,479,442,919.90/70,506.76
  6. Step 6: Final answer
    x = 63,532.11

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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.