Home / 147,979.30-221,713.80-68,931.40

Finding the Fourth Proportional to 147,979.30, 221,713.80 and 68,931.40

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Solution

The fourth proportional to 147,979.30, 221,713.80 and 68,931.40 is: 103,278.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,979.30 : 221,713.80 = 68,931.40 : x
  2. Step 2: Convert to fraction form
    147,979.30/221,713.80 = 68,931.40/x
  3. Step 3: Cross multiply
    147,979.30x = 221,713.80 × 68,931.40
  4. Step 4: Simplify right side
    147,979.30x = 15,283,042,633.32
  5. Step 5: Solve for x
    x = 15,283,042,633.32/147,979.30
  6. Step 6: Final answer
    x = 103,278.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.