Home / 128,518.04-177,347.94-71,918.48

Finding the Fourth Proportional to 128,518.04, 177,347.94 and 71,918.48

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Solution

The fourth proportional to 128,518.04, 177,347.94 and 71,918.48 is: 99,243.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,518.04 : 177,347.94 = 71,918.48 : x
  2. Step 2: Convert to fraction form
    128,518.04/177,347.94 = 71,918.48/x
  3. Step 3: Cross multiply
    128,518.04x = 177,347.94 × 71,918.48
  4. Step 4: Simplify right side
    128,518.04x = 12,754,594,275.93
  5. Step 5: Solve for x
    x = 12,754,594,275.93/128,518.04
  6. Step 6: Final answer
    x = 99,243.61

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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.