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Finding the Fourth Proportional to 142,659.40, 213,908.10 and 53,915.80

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Solution

The fourth proportional to 142,659.40, 213,908.10 and 53,915.80 is: 80,843.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,659.40 : 213,908.10 = 53,915.80 : x
  2. Step 2: Convert to fraction form
    142,659.40/213,908.10 = 53,915.80/x
  3. Step 3: Cross multiply
    142,659.40x = 213,908.10 × 53,915.80
  4. Step 4: Simplify right side
    142,659.40x = 11,533,026,337.98
  5. Step 5: Solve for x
    x = 11,533,026,337.98/142,659.40
  6. Step 6: Final answer
    x = 80,843.09

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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.