Home / 105,665.06-145,816.92-57,918.30

Finding the Fourth Proportional to 105,665.06, 145,816.92 and 57,918.30

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Solution

The fourth proportional to 105,665.06, 145,816.92 and 57,918.30 is: 79,926.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,665.06 : 145,816.92 = 57,918.30 : x
  2. Step 2: Convert to fraction form
    105,665.06/145,816.92 = 57,918.30/x
  3. Step 3: Cross multiply
    105,665.06x = 145,816.92 × 57,918.30
  4. Step 4: Simplify right side
    105,665.06x = 8,445,468,117.64
  5. Step 5: Solve for x
    x = 8,445,468,117.64/105,665.06
  6. Step 6: Final answer
    x = 79,926.78

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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.