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Finding the Fourth Proportional to 112,730.40, 168,980.40 and 65,959.20

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Solution

The fourth proportional to 112,730.40, 168,980.40 and 65,959.20 is: 98,871.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,730.40 : 168,980.40 = 65,959.20 : x
  2. Step 2: Convert to fraction form
    112,730.40/168,980.40 = 65,959.20/x
  3. Step 3: Cross multiply
    112,730.40x = 168,980.40 × 65,959.20
  4. Step 4: Simplify right side
    112,730.40x = 11,145,811,999.68
  5. Step 5: Solve for x
    x = 11,145,811,999.68/112,730.40
  6. Step 6: Final answer
    x = 98,871.40

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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.