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Finding the Fourth Proportional to 127,987.86, 192,018.64 and 39,254.38

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Solution

The fourth proportional to 127,987.86, 192,018.64 and 39,254.38 is: 58,892.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,987.86 : 192,018.64 = 39,254.38 : x
  2. Step 2: Convert to fraction form
    127,987.86/192,018.64 = 39,254.38/x
  3. Step 3: Cross multiply
    127,987.86x = 192,018.64 × 39,254.38
  4. Step 4: Simplify right side
    127,987.86x = 7,537,572,661.64
  5. Step 5: Solve for x
    x = 7,537,572,661.64/127,987.86
  6. Step 6: Final answer
    x = 58,892.87

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1.5x scale

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.