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Finding the Fourth Proportional to 70,565.58, 105,824.88 and 20,648.52

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Solution

The fourth proportional to 70,565.58, 105,824.88 and 20,648.52 is: 30,965.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,565.58 : 105,824.88 = 20,648.52 : x
  2. Step 2: Convert to fraction form
    70,565.58/105,824.88 = 20,648.52/x
  3. Step 3: Cross multiply
    70,565.58x = 105,824.88 × 20,648.52
  4. Step 4: Simplify right side
    70,565.58x = 2,185,127,151.18
  5. Step 5: Solve for x
    x = 2,185,127,151.18/70,565.58
  6. Step 6: Final answer
    x = 30,965.91

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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.