Home / 143,030.32-197,381.88-79,378.36

Finding the Fourth Proportional to 143,030.32, 197,381.88 and 79,378.36

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Solution

The fourth proportional to 143,030.32, 197,381.88 and 79,378.36 is: 109,542.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,030.32 : 197,381.88 = 79,378.36 : x
  2. Step 2: Convert to fraction form
    143,030.32/197,381.88 = 79,378.36/x
  3. Step 3: Cross multiply
    143,030.32x = 197,381.88 × 79,378.36
  4. Step 4: Simplify right side
    143,030.32x = 15,667,849,928.12
  5. Step 5: Solve for x
    x = 15,667,849,928.12/143,030.32
  6. Step 6: Final answer
    x = 109,542.16

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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.