Home / 138,723.12-208,095.36-49,985.28

Finding the Fourth Proportional to 138,723.12, 208,095.36 and 49,985.28

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Solution

The fourth proportional to 138,723.12, 208,095.36 and 49,985.28 is: 74,981.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,723.12 : 208,095.36 = 49,985.28 : x
  2. Step 2: Convert to fraction form
    138,723.12/208,095.36 = 49,985.28/x
  3. Step 3: Cross multiply
    138,723.12x = 208,095.36 × 49,985.28
  4. Step 4: Simplify right side
    138,723.12x = 10,401,704,836.30
  5. Step 5: Solve for x
    x = 10,401,704,836.30/138,723.12
  6. Step 6: Final answer
    x = 74,981.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.