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Finding the Fourth Proportional to 100,859.60, 139,187.16 and 55,539.19

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Solution

The fourth proportional to 100,859.60, 139,187.16 and 55,539.19 is: 76,644.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,859.60 : 139,187.16 = 55,539.19 : x
  2. Step 2: Convert to fraction form
    100,859.60/139,187.16 = 55,539.19/x
  3. Step 3: Cross multiply
    100,859.60x = 139,187.16 × 55,539.19
  4. Step 4: Simplify right side
    100,859.60x = 7,730,342,454.99
  5. Step 5: Solve for x
    x = 7,730,342,454.99/100,859.60
  6. Step 6: Final answer
    x = 76,644.59

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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.