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Finding the Fourth Proportional to 100,857.60, 139,182.28 and 55,534.60

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Solution

The fourth proportional to 100,857.60, 139,182.28 and 55,534.60 is: 76,637.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,857.60 : 139,182.28 = 55,534.60 : x
  2. Step 2: Convert to fraction form
    100,857.60/139,182.28 = 55,534.60/x
  3. Step 3: Cross multiply
    100,857.60x = 139,182.28 × 55,534.60
  4. Step 4: Simplify right side
    100,857.60x = 7,729,432,246.89
  5. Step 5: Solve for x
    x = 7,729,432,246.89/100,857.60
  6. Step 6: Final answer
    x = 76,637.08

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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.