Home / 78,186.55-107,897.62-42,376.56

Finding the Fourth Proportional to 78,186.55, 107,897.62 and 42,376.56

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Solution

The fourth proportional to 78,186.55, 107,897.62 and 42,376.56 is: 58,479.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,186.55 : 107,897.62 = 42,376.56 : x
  2. Step 2: Convert to fraction form
    78,186.55/107,897.62 = 42,376.56/x
  3. Step 3: Cross multiply
    78,186.55x = 107,897.62 × 42,376.56
  4. Step 4: Simplify right side
    78,186.55x = 4,572,329,967.79
  5. Step 5: Solve for x
    x = 4,572,329,967.79/78,186.55
  6. Step 6: Final answer
    x = 58,479.75

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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.