Home / 56,715.20-78,266.40-31,563.20

Finding the Fourth Proportional to 56,715.20, 78,266.40 and 31,563.20

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Solution

The fourth proportional to 56,715.20, 78,266.40 and 31,563.20 is: 43,556.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,715.20 : 78,266.40 = 31,563.20 : x
  2. Step 2: Convert to fraction form
    56,715.20/78,266.40 = 31,563.20/x
  3. Step 3: Cross multiply
    56,715.20x = 78,266.40 × 31,563.20
  4. Step 4: Simplify right side
    56,715.20x = 2,470,338,036.48
  5. Step 5: Solve for x
    x = 2,470,338,036.48/56,715.20
  6. Step 6: Final answer
    x = 43,556.90

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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.