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Finding the Fourth Proportional to 115,658.90, 161,715.10 and 115,658.90

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Solution

The fourth proportional to 115,658.90, 161,715.10 and 115,658.90 is: 161,715.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,658.90 : 161,715.10 = 115,658.90 : x
  2. Step 2: Convert to fraction form
    115,658.90/161,715.10 = 115,658.90/x
  3. Step 3: Cross multiply
    115,658.90x = 161,715.10 × 115,658.90
  4. Step 4: Simplify right side
    115,658.90x = 18,703,790,579.39
  5. Step 5: Solve for x
    x = 18,703,790,579.39/115,658.90
  6. Step 6: Final answer
    x = 161,715.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.