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Finding the Fourth Proportional to 143,412.72, 197,894.40 and 79,740.24

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Solution

The fourth proportional to 143,412.72, 197,894.40 and 79,740.24 is: 110,033.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,412.72 : 197,894.40 = 79,740.24 : x
  2. Step 2: Convert to fraction form
    143,412.72/197,894.40 = 79,740.24/x
  3. Step 3: Cross multiply
    143,412.72x = 197,894.40 × 79,740.24
  4. Step 4: Simplify right side
    143,412.72x = 15,780,146,950.66
  5. Step 5: Solve for x
    x = 15,780,146,950.66/143,412.72
  6. Step 6: Final answer
    x = 110,033.11

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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.