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Finding the Fourth Proportional to 123,294.81, 170,146.91 and 85,590.93

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Solution

The fourth proportional to 123,294.81, 170,146.91 and 85,590.93 is: 118,115.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,294.81 : 170,146.91 = 85,590.93 : x
  2. Step 2: Convert to fraction form
    123,294.81/170,146.91 = 85,590.93/x
  3. Step 3: Cross multiply
    123,294.81x = 170,146.91 × 85,590.93
  4. Step 4: Simplify right side
    123,294.81x = 14,563,031,835.57
  5. Step 5: Solve for x
    x = 14,563,031,835.57/123,294.81
  6. Step 6: Final answer
    x = 118,115.53

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1.5x scale

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.