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Finding the Fourth Proportional to 84,316.80, 126,475.20 and 42,326.40

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Solution

The fourth proportional to 84,316.80, 126,475.20 and 42,326.40 is: 63,489.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,316.80 : 126,475.20 = 42,326.40 : x
  2. Step 2: Convert to fraction form
    84,316.80/126,475.20 = 42,326.40/x
  3. Step 3: Cross multiply
    84,316.80x = 126,475.20 × 42,326.40
  4. Step 4: Simplify right side
    84,316.80x = 5,353,239,905.28
  5. Step 5: Solve for x
    x = 5,353,239,905.28/84,316.80
  6. Step 6: Final answer
    x = 63,489.60

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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.