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Finding the Fourth Proportional to 143,387.58, 197,870.79 and 79,724.22

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Solution

The fourth proportional to 143,387.58, 197,870.79 and 79,724.22 is: 110,017.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,387.58 : 197,870.79 = 79,724.22 : x
  2. Step 2: Convert to fraction form
    143,387.58/197,870.79 = 79,724.22/x
  3. Step 3: Cross multiply
    143,387.58x = 197,870.79 × 79,724.22
  4. Step 4: Simplify right side
    143,387.58x = 15,775,094,393.53
  5. Step 5: Solve for x
    x = 15,775,094,393.53/143,387.58
  6. Step 6: Final answer
    x = 110,017.16

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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.