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Finding the Fourth Proportional to 84,870.10, 127,195.80 and 61,469.20

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Solution

The fourth proportional to 84,870.10, 127,195.80 and 61,469.20 is: 92,124.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,870.10 : 127,195.80 = 61,469.20 : x
  2. Step 2: Convert to fraction form
    84,870.10/127,195.80 = 61,469.20/x
  3. Step 3: Cross multiply
    84,870.10x = 127,195.80 × 61,469.20
  4. Step 4: Simplify right side
    84,870.10x = 7,818,624,069.36
  5. Step 5: Solve for x
    x = 7,818,624,069.36/84,870.10
  6. Step 6: Final answer
    x = 92,124.60

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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.