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Finding the Fourth Proportional to 147,123.40, 220,685.10 and 84,915.40

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Solution

The fourth proportional to 147,123.40, 220,685.10 and 84,915.40 is: 127,373.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,123.40 : 220,685.10 = 84,915.40 : x
  2. Step 2: Convert to fraction form
    147,123.40/220,685.10 = 84,915.40/x
  3. Step 3: Cross multiply
    147,123.40x = 220,685.10 × 84,915.40
  4. Step 4: Simplify right side
    147,123.40x = 18,739,563,540.54
  5. Step 5: Solve for x
    x = 18,739,563,540.54/147,123.40
  6. Step 6: Final answer
    x = 127,373.10

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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.