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Finding the Fourth Proportional to 86,816.78, 119,830.55 and 51,030.78

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Solution

The fourth proportional to 86,816.78, 119,830.55 and 51,030.78 is: 70,436.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,816.78 : 119,830.55 = 51,030.78 : x
  2. Step 2: Convert to fraction form
    86,816.78/119,830.55 = 51,030.78/x
  3. Step 3: Cross multiply
    86,816.78x = 119,830.55 × 51,030.78
  4. Step 4: Simplify right side
    86,816.78x = 6,115,045,729.81
  5. Step 5: Solve for x
    x = 6,115,045,729.81/86,816.78
  6. Step 6: Final answer
    x = 70,436.22

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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.