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Finding the Fourth Proportional to 51,870.90, 71,580.90 and 29,209.80

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Solution

The fourth proportional to 51,870.90, 71,580.90 and 29,209.80 is: 40,308.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,870.90 : 71,580.90 = 29,209.80 : x
  2. Step 2: Convert to fraction form
    51,870.90/71,580.90 = 29,209.80/x
  3. Step 3: Cross multiply
    51,870.90x = 71,580.90 × 29,209.80
  4. Step 4: Simplify right side
    51,870.90x = 2,090,863,772.82
  5. Step 5: Solve for x
    x = 2,090,863,772.82/51,870.90
  6. Step 6: Final answer
    x = 40,308.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.