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Finding the Fourth Proportional to 121,911.52, 168,250.56 and 70,230.40

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Solution

The fourth proportional to 121,911.52, 168,250.56 and 70,230.40 is: 96,925.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,911.52 : 168,250.56 = 70,230.40 : x
  2. Step 2: Convert to fraction form
    121,911.52/168,250.56 = 70,230.40/x
  3. Step 3: Cross multiply
    121,911.52x = 168,250.56 × 70,230.40
  4. Step 4: Simplify right side
    121,911.52x = 11,816,304,129.02
  5. Step 5: Solve for x
    x = 11,816,304,129.02/121,911.52
  6. Step 6: Final answer
    x = 96,925.25

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1.5x scale

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.