Home / 213,990.72-320,985.28-64,230.36

Finding the Fourth Proportional to 213,990.72, 320,985.28 and 64,230.36

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Solution

The fourth proportional to 213,990.72, 320,985.28 and 64,230.36 is: 96,345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,990.72 : 320,985.28 = 64,230.36 : x
  2. Step 2: Convert to fraction form
    213,990.72/320,985.28 = 64,230.36/x
  3. Step 3: Cross multiply
    213,990.72x = 320,985.28 × 64,230.36
  4. Step 4: Simplify right side
    213,990.72x = 20,617,000,089.10
  5. Step 5: Solve for x
    x = 20,617,000,089.10/213,990.72
  6. Step 6: Final answer
    x = 96,345.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.