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Finding the Fourth Proportional to 112,527.18, 168,786.18 and 28,287.90

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Solution

The fourth proportional to 112,527.18, 168,786.18 and 28,287.90 is: 42,430.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,527.18 : 168,786.18 = 28,287.90 : x
  2. Step 2: Convert to fraction form
    112,527.18/168,786.18 = 28,287.90/x
  3. Step 3: Cross multiply
    112,527.18x = 168,786.18 × 28,287.90
  4. Step 4: Simplify right side
    112,527.18x = 4,774,606,581.22
  5. Step 5: Solve for x
    x = 4,774,606,581.22/112,527.18
  6. Step 6: Final answer
    x = 42,430.70

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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.