Home / 109,659.11-151,312.50-61,911.45

Finding the Fourth Proportional to 109,659.11, 151,312.50 and 61,911.45

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Solution

The fourth proportional to 109,659.11, 151,312.50 and 61,911.45 is: 85,428.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,659.11 : 151,312.50 = 61,911.45 : x
  2. Step 2: Convert to fraction form
    109,659.11/151,312.50 = 61,911.45/x
  3. Step 3: Cross multiply
    109,659.11x = 151,312.50 × 61,911.45
  4. Step 4: Simplify right side
    109,659.11x = 9,367,976,278.13
  5. Step 5: Solve for x
    x = 9,367,976,278.13/109,659.11
  6. Step 6: Final answer
    x = 85,428.17

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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.