Home / 105,708.12-145,923.72-74,001.48

Finding the Fourth Proportional to 105,708.12, 145,923.72 and 74,001.48

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Solution

The fourth proportional to 105,708.12, 145,923.72 and 74,001.48 is: 102,154.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,708.12 : 145,923.72 = 74,001.48 : x
  2. Step 2: Convert to fraction form
    105,708.12/145,923.72 = 74,001.48/x
  3. Step 3: Cross multiply
    105,708.12x = 145,923.72 × 74,001.48
  4. Step 4: Simplify right side
    105,708.12x = 10,798,571,247.11
  5. Step 5: Solve for x
    x = 10,798,571,247.11/105,708.12
  6. Step 6: Final answer
    x = 102,154.61

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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.