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Finding the Fourth Proportional to 72,918.80, 100,635.08 and 42,702.24

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Solution

The fourth proportional to 72,918.80, 100,635.08 and 42,702.24 is: 58,933.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,918.80 : 100,635.08 = 42,702.24 : x
  2. Step 2: Convert to fraction form
    72,918.80/100,635.08 = 42,702.24/x
  3. Step 3: Cross multiply
    72,918.80x = 100,635.08 × 42,702.24
  4. Step 4: Simplify right side
    72,918.80x = 4,297,343,338.58
  5. Step 5: Solve for x
    x = 4,297,343,338.58/72,918.80
  6. Step 6: Final answer
    x = 58,933.27

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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.