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Finding the Fourth Proportional to 101,702.28, 140,348.76 and 56,990.28

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Solution

The fourth proportional to 101,702.28, 140,348.76 and 56,990.28 is: 78,646.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,702.28 : 140,348.76 = 56,990.28 : x
  2. Step 2: Convert to fraction form
    101,702.28/140,348.76 = 56,990.28/x
  3. Step 3: Cross multiply
    101,702.28x = 140,348.76 × 56,990.28
  4. Step 4: Simplify right side
    101,702.28x = 7,998,515,130.05
  5. Step 5: Solve for x
    x = 7,998,515,130.05/101,702.28
  6. Step 6: Final answer
    x = 78,646.37

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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.