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Finding the Fourth Proportional to 70,671.45, 105,965.65 and 28,552.87

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Solution

The fourth proportional to 70,671.45, 105,965.65 and 28,552.87 is: 42,812.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,671.45 : 105,965.65 = 28,552.87 : x
  2. Step 2: Convert to fraction form
    70,671.45/105,965.65 = 28,552.87/x
  3. Step 3: Cross multiply
    70,671.45x = 105,965.65 × 28,552.87
  4. Step 4: Simplify right side
    70,671.45x = 3,025,623,428.92
  5. Step 5: Solve for x
    x = 3,025,623,428.92/70,671.45
  6. Step 6: Final answer
    x = 42,812.53

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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.