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Finding the Fourth Proportional to 70,437.25, 105,631.44 and 28,304.83

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Solution

The fourth proportional to 70,437.25, 105,631.44 and 28,304.83 is: 42,447.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,437.25 : 105,631.44 = 28,304.83 : x
  2. Step 2: Convert to fraction form
    70,437.25/105,631.44 = 28,304.83/x
  3. Step 3: Cross multiply
    70,437.25x = 105,631.44 × 28,304.83
  4. Step 4: Simplify right side
    70,437.25x = 2,989,879,951.86
  5. Step 5: Solve for x
    x = 2,989,879,951.86/70,437.25
  6. Step 6: Final answer
    x = 42,447.43

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1.5x scale

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.