Home / 105,729.18-145,908.27-57,979.68

Finding the Fourth Proportional to 105,729.18, 145,908.27 and 57,979.68

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Solution

The fourth proportional to 105,729.18, 145,908.27 and 57,979.68 is: 80,013.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,729.18 : 145,908.27 = 57,979.68 : x
  2. Step 2: Convert to fraction form
    105,729.18/145,908.27 = 57,979.68/x
  3. Step 3: Cross multiply
    105,729.18x = 145,908.27 × 57,979.68
  4. Step 4: Simplify right side
    105,729.18x = 8,459,714,803.95
  5. Step 5: Solve for x
    x = 8,459,714,803.95/105,729.18
  6. Step 6: Final answer
    x = 80,013.06

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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.