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Finding the Fourth Proportional to 100,860.31, 139,190.16 and 55,539.46

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Solution

The fourth proportional to 100,860.31, 139,190.16 and 55,539.46 is: 76,646.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,860.31 : 139,190.16 = 55,539.46 : x
  2. Step 2: Convert to fraction form
    100,860.31/139,190.16 = 55,539.46/x
  3. Step 3: Cross multiply
    100,860.31x = 139,190.16 × 55,539.46
  4. Step 4: Simplify right side
    100,860.31x = 7,730,546,323.71
  5. Step 5: Solve for x
    x = 7,730,546,323.71/100,860.31
  6. Step 6: Final answer
    x = 76,646.07

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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.