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Finding the Fourth Proportional to 86,900.50, 119,922.69 and 47,156.50

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Solution

The fourth proportional to 86,900.50, 119,922.69 and 47,156.50 is: 65,075.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,900.50 : 119,922.69 = 47,156.50 : x
  2. Step 2: Convert to fraction form
    86,900.50/119,922.69 = 47,156.50/x
  3. Step 3: Cross multiply
    86,900.50x = 119,922.69 × 47,156.50
  4. Step 4: Simplify right side
    86,900.50x = 5,655,134,330.99
  5. Step 5: Solve for x
    x = 5,655,134,330.99/86,900.50
  6. Step 6: Final answer
    x = 65,075.97

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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.