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Finding the Fourth Proportional to 47,278.70, 70,918.05 and 42,904.70

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Solution

The fourth proportional to 47,278.70, 70,918.05 and 42,904.70 is: 64,357.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,278.70 : 70,918.05 = 42,904.70 : x
  2. Step 2: Convert to fraction form
    47,278.70/70,918.05 = 42,904.70/x
  3. Step 3: Cross multiply
    47,278.70x = 70,918.05 × 42,904.70
  4. Step 4: Simplify right side
    47,278.70x = 3,042,717,659.84
  5. Step 5: Solve for x
    x = 3,042,717,659.84/47,278.70
  6. Step 6: Final answer
    x = 64,357.05

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Similar ratio
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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.