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Finding the Fourth Proportional to 86,682.98, 130,017.99 and 31,278.98

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Solution

The fourth proportional to 86,682.98, 130,017.99 and 31,278.98 is: 46,916.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,682.98 : 130,017.99 = 31,278.98 : x
  2. Step 2: Convert to fraction form
    86,682.98/130,017.99 = 31,278.98/x
  3. Step 3: Cross multiply
    86,682.98x = 130,017.99 × 31,278.98
  4. Step 4: Simplify right side
    86,682.98x = 4,066,830,108.85
  5. Step 5: Solve for x
    x = 4,066,830,108.85/86,682.98
  6. Step 6: Final answer
    x = 46,916.13

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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.