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Finding the Fourth Proportional to 100,153.37, 138,211.43 and 59,865.18

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Solution

The fourth proportional to 100,153.37, 138,211.43 and 59,865.18 is: 82,613.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,153.37 : 138,211.43 = 59,865.18 : x
  2. Step 2: Convert to fraction form
    100,153.37/138,211.43 = 59,865.18/x
  3. Step 3: Cross multiply
    100,153.37x = 138,211.43 × 59,865.18
  4. Step 4: Simplify right side
    100,153.37x = 8,274,051,835.68
  5. Step 5: Solve for x
    x = 8,274,051,835.68/100,153.37
  6. Step 6: Final answer
    x = 82,613.82

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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.