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Finding the Fourth Proportional to 65,790, 90,790.04 and 37,109.57

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Solution

The fourth proportional to 65,790, 90,790.04 and 37,109.57 is: 51,211.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,790 : 90,790.04 = 37,109.57 : x
  2. Step 2: Convert to fraction form
    65,790/90,790.04 = 37,109.57/x
  3. Step 3: Cross multiply
    65,790x = 90,790.04 × 37,109.57
  4. Step 4: Simplify right side
    65,790x = 3,369,178,983.51
  5. Step 5: Solve for x
    x = 3,369,178,983.51/65,790
  6. Step 6: Final answer
    x = 51,211.11

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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.