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Finding the Fourth Proportional to 65,291.91, 97,875.73 and 20,890.03

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Solution

The fourth proportional to 65,291.91, 97,875.73 and 20,890.03 is: 31,315.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,291.91 : 97,875.73 = 20,890.03 : x
  2. Step 2: Convert to fraction form
    65,291.91/97,875.73 = 20,890.03/x
  3. Step 3: Cross multiply
    65,291.91x = 97,875.73 × 20,890.03
  4. Step 4: Simplify right side
    65,291.91x = 2,044,626,935.97
  5. Step 5: Solve for x
    x = 2,044,626,935.97/65,291.91
  6. Step 6: Final answer
    x = 31,315.17

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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.