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Finding the Fourth Proportional to 86,699.48, 119,631.38 and 52,689.81

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Solution

The fourth proportional to 86,699.48, 119,631.38 and 52,689.81 is: 72,703.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,699.48 : 119,631.38 = 52,689.81 : x
  2. Step 2: Convert to fraction form
    86,699.48/119,631.38 = 52,689.81/x
  3. Step 3: Cross multiply
    86,699.48x = 119,631.38 × 52,689.81
  4. Step 4: Simplify right side
    86,699.48x = 6,303,354,418.79
  5. Step 5: Solve for x
    x = 6,303,354,418.79/86,699.48
  6. Step 6: Final answer
    x = 72,703.49

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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.