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Finding the Fourth Proportional to 143,403.61, 197,888.85 and 79,740.04

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Solution

The fourth proportional to 143,403.61, 197,888.85 and 79,740.04 is: 110,036.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,403.61 : 197,888.85 = 79,740.04 : x
  2. Step 2: Convert to fraction form
    143,403.61/197,888.85 = 79,740.04/x
  3. Step 3: Cross multiply
    143,403.61x = 197,888.85 × 79,740.04
  4. Step 4: Simplify right side
    143,403.61x = 15,779,664,319.83
  5. Step 5: Solve for x
    x = 15,779,664,319.83/143,403.61
  6. Step 6: Final answer
    x = 110,036.73

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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.