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Finding the Fourth Proportional to 112,655.40, 168,983.10 and 105,743.40

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Solution

The fourth proportional to 112,655.40, 168,983.10 and 105,743.40 is: 158,615.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,655.40 : 168,983.10 = 105,743.40 : x
  2. Step 2: Convert to fraction form
    112,655.40/168,983.10 = 105,743.40/x
  3. Step 3: Cross multiply
    112,655.40x = 168,983.10 × 105,743.40
  4. Step 4: Simplify right side
    112,655.40x = 17,868,847,536.54
  5. Step 5: Solve for x
    x = 17,868,847,536.54/112,655.40
  6. Step 6: Final answer
    x = 158,615.10

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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.