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Finding the Fourth Proportional to 112,656.40, 155,459.46 and 61,659.52

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Solution

The fourth proportional to 112,656.40, 155,459.46 and 61,659.52 is: 85,086.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,656.40 : 155,459.46 = 61,659.52 : x
  2. Step 2: Convert to fraction form
    112,656.40/155,459.46 = 61,659.52/x
  3. Step 3: Cross multiply
    112,656.40x = 155,459.46 × 61,659.52
  4. Step 4: Simplify right side
    112,656.40x = 9,585,555,683.06
  5. Step 5: Solve for x
    x = 9,585,555,683.06/112,656.40
  6. Step 6: Final answer
    x = 85,086.65

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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.