Home / 128,338.16-177,114.40-71,749.94

Finding the Fourth Proportional to 128,338.16, 177,114.40 and 71,749.94

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Solution

The fourth proportional to 128,338.16, 177,114.40 and 71,749.94 is: 99,019.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,338.16 : 177,114.40 = 71,749.94 : x
  2. Step 2: Convert to fraction form
    128,338.16/177,114.40 = 71,749.94/x
  3. Step 3: Cross multiply
    128,338.16x = 177,114.40 × 71,749.94
  4. Step 4: Simplify right side
    128,338.16x = 12,707,946,508.19
  5. Step 5: Solve for x
    x = 12,707,946,508.19/128,338.16
  6. Step 6: Final answer
    x = 99,019.24

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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.