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Finding the Fourth Proportional to 112,406.40, 168,619.20 and 38,534.40

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Solution

The fourth proportional to 112,406.40, 168,619.20 and 38,534.40 is: 57,804.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,406.40 : 168,619.20 = 38,534.40 : x
  2. Step 2: Convert to fraction form
    112,406.40/168,619.20 = 38,534.40/x
  3. Step 3: Cross multiply
    112,406.40x = 168,619.20 × 38,534.40
  4. Step 4: Simplify right side
    112,406.40x = 6,497,639,700.48
  5. Step 5: Solve for x
    x = 6,497,639,700.48/112,406.40
  6. Step 6: Final answer
    x = 57,804.89

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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.