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Finding the Fourth Proportional to 51,047.76, 70,443 and 28,385.40

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Solution

The fourth proportional to 51,047.76, 70,443 and 28,385.40 is: 39,170.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,047.76 : 70,443 = 28,385.40 : x
  2. Step 2: Convert to fraction form
    51,047.76/70,443 = 28,385.40/x
  3. Step 3: Cross multiply
    51,047.76x = 70,443 × 28,385.40
  4. Step 4: Simplify right side
    51,047.76x = 1,999,552,732.20
  5. Step 5: Solve for x
    x = 1,999,552,732.20/51,047.76
  6. Step 6: Final answer
    x = 39,170.23

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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.