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Finding the Fourth Proportional to 86,818.50, 119,824.89 and 51,008.50

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Solution

The fourth proportional to 86,818.50, 119,824.89 and 51,008.50 is: 70,400.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,818.50 : 119,824.89 = 51,008.50 : x
  2. Step 2: Convert to fraction form
    86,818.50/119,824.89 = 51,008.50/x
  3. Step 3: Cross multiply
    86,818.50x = 119,824.89 × 51,008.50
  4. Step 4: Simplify right side
    86,818.50x = 6,112,087,860.06
  5. Step 5: Solve for x
    x = 6,112,087,860.06/86,818.50
  6. Step 6: Final answer
    x = 70,400.75

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1.5x scale

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.