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Finding the Fourth Proportional to 70,311.76, 105,478.64 and 22,915.87

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Solution

The fourth proportional to 70,311.76, 105,478.64 and 22,915.87 is: 34,377.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,311.76 : 105,478.64 = 22,915.87 : x
  2. Step 2: Convert to fraction form
    70,311.76/105,478.64 = 22,915.87/x
  3. Step 3: Cross multiply
    70,311.76x = 105,478.64 × 22,915.87
  4. Step 4: Simplify right side
    70,311.76x = 2,417,134,802.02
  5. Step 5: Solve for x
    x = 2,417,134,802.02/70,311.76
  6. Step 6: Final answer
    x = 34,377.39

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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.