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Finding the Fourth Proportional to 51,079.47, 70,490.30 and 28,723.47

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Solution

The fourth proportional to 51,079.47, 70,490.30 and 28,723.47 is: 39,638.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,079.47 : 70,490.30 = 28,723.47 : x
  2. Step 2: Convert to fraction form
    51,079.47/70,490.30 = 28,723.47/x
  3. Step 3: Cross multiply
    51,079.47x = 70,490.30 × 28,723.47
  4. Step 4: Simplify right side
    51,079.47x = 2,024,725,873.72
  5. Step 5: Solve for x
    x = 2,024,725,873.72/51,079.47
  6. Step 6: Final answer
    x = 39,638.74

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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.