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Finding the Fourth Proportional to 159,412.40, 219,980.68 and 91,425.86

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Solution

The fourth proportional to 159,412.40, 219,980.68 and 91,425.86 is: 126,162.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,412.40 : 219,980.68 = 91,425.86 : x
  2. Step 2: Convert to fraction form
    159,412.40/219,980.68 = 91,425.86/x
  3. Step 3: Cross multiply
    159,412.40x = 219,980.68 × 91,425.86
  4. Step 4: Simplify right side
    159,412.40x = 20,111,922,852.38
  5. Step 5: Solve for x
    x = 20,111,922,852.38/159,412.40
  6. Step 6: Final answer
    x = 126,162.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.