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Finding the Fourth Proportional to 112,027.60, 168,041.40 and 86,658.40

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Solution

The fourth proportional to 112,027.60, 168,041.40 and 86,658.40 is: 129,987.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,027.60 : 168,041.40 = 86,658.40 : x
  2. Step 2: Convert to fraction form
    112,027.60/168,041.40 = 86,658.40/x
  3. Step 3: Cross multiply
    112,027.60x = 168,041.40 × 86,658.40
  4. Step 4: Simplify right side
    112,027.60x = 14,562,198,857.76
  5. Step 5: Solve for x
    x = 14,562,198,857.76/112,027.60
  6. Step 6: Final answer
    x = 129,987.60

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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.