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Finding the Fourth Proportional to 86,731, 119,688.94 and 46,987

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Solution

The fourth proportional to 86,731, 119,688.94 and 46,987 is: 64,842.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,731 : 119,688.94 = 46,987 : x
  2. Step 2: Convert to fraction form
    86,731/119,688.94 = 46,987/x
  3. Step 3: Cross multiply
    86,731x = 119,688.94 × 46,987
  4. Step 4: Simplify right side
    86,731x = 5,623,824,223.78
  5. Step 5: Solve for x
    x = 5,623,824,223.78/86,731
  6. Step 6: Final answer
    x = 64,842.15

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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.