Home / 102,389.78-141,298.55-57,070.64

Finding the Fourth Proportional to 102,389.78, 141,298.55 and 57,070.64

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Solution

The fourth proportional to 102,389.78, 141,298.55 and 57,070.64 is: 78,757.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,389.78 : 141,298.55 = 57,070.64 : x
  2. Step 2: Convert to fraction form
    102,389.78/141,298.55 = 57,070.64/x
  3. Step 3: Cross multiply
    102,389.78x = 141,298.55 × 57,070.64
  4. Step 4: Simplify right side
    102,389.78x = 8,063,998,059.67
  5. Step 5: Solve for x
    x = 8,063,998,059.67/102,389.78
  6. Step 6: Final answer
    x = 78,757.84

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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.