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Finding the Fourth Proportional to 70,452.24, 105,712.95 and 28,330.62

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Solution

The fourth proportional to 70,452.24, 105,712.95 and 28,330.62 is: 42,509.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,452.24 : 105,712.95 = 28,330.62 : x
  2. Step 2: Convert to fraction form
    70,452.24/105,712.95 = 28,330.62/x
  3. Step 3: Cross multiply
    70,452.24x = 105,712.95 × 28,330.62
  4. Step 4: Simplify right side
    70,452.24x = 2,994,913,415.53
  5. Step 5: Solve for x
    x = 2,994,913,415.53/70,452.24
  6. Step 6: Final answer
    x = 42,509.84

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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.