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Finding the Fourth Proportional to 70,146.70, 105,220.05 and 57,680.80

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Solution

The fourth proportional to 70,146.70, 105,220.05 and 57,680.80 is: 86,521.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,146.70 : 105,220.05 = 57,680.80 : x
  2. Step 2: Convert to fraction form
    70,146.70/105,220.05 = 57,680.80/x
  3. Step 3: Cross multiply
    70,146.70x = 105,220.05 × 57,680.80
  4. Step 4: Simplify right side
    70,146.70x = 6,069,176,660.04
  5. Step 5: Solve for x
    x = 6,069,176,660.04/70,146.70
  6. Step 6: Final answer
    x = 86,521.20

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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.