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Finding the Fourth Proportional to 90,699, 125,195.58 and 56,270.04

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Solution

The fourth proportional to 90,699, 125,195.58 and 56,270.04 is: 77,671.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,699 : 125,195.58 = 56,270.04 : x
  2. Step 2: Convert to fraction form
    90,699/125,195.58 = 56,270.04/x
  3. Step 3: Cross multiply
    90,699x = 125,195.58 × 56,270.04
  4. Step 4: Simplify right side
    90,699x = 7,044,760,294.42
  5. Step 5: Solve for x
    x = 7,044,760,294.42/90,699
  6. Step 6: Final answer
    x = 77,671.86

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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.