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Finding the Fourth Proportional to 139,100.60, 191,904.48 and 90,759.39

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Solution

The fourth proportional to 139,100.60, 191,904.48 and 90,759.39 is: 125,212.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,100.60 : 191,904.48 = 90,759.39 : x
  2. Step 2: Convert to fraction form
    139,100.60/191,904.48 = 90,759.39/x
  3. Step 3: Cross multiply
    139,100.60x = 191,904.48 × 90,759.39
  4. Step 4: Simplify right side
    139,100.60x = 17,417,133,543.07
  5. Step 5: Solve for x
    x = 17,417,133,543.07/139,100.60
  6. Step 6: Final answer
    x = 125,212.50

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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.