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Finding the Fourth Proportional to 128,055.60, 191,921.40 and 49,064.40

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Solution

The fourth proportional to 128,055.60, 191,921.40 and 49,064.40 is: 73,534.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,055.60 : 191,921.40 = 49,064.40 : x
  2. Step 2: Convert to fraction form
    128,055.60/191,921.40 = 49,064.40/x
  3. Step 3: Cross multiply
    128,055.60x = 191,921.40 × 49,064.40
  4. Step 4: Simplify right side
    128,055.60x = 9,416,508,338.16
  5. Step 5: Solve for x
    x = 9,416,508,338.16/128,055.60
  6. Step 6: Final answer
    x = 73,534.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.