Home / 54,345.90-81,421.65-45,986.70

Finding the Fourth Proportional to 54,345.90, 81,421.65 and 45,986.70

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Solution

The fourth proportional to 54,345.90, 81,421.65 and 45,986.70 is: 68,897.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,345.90 : 81,421.65 = 45,986.70 : x
  2. Step 2: Convert to fraction form
    54,345.90/81,421.65 = 45,986.70/x
  3. Step 3: Cross multiply
    54,345.90x = 81,421.65 × 45,986.70
  4. Step 4: Simplify right side
    54,345.90x = 3,744,312,992.06
  5. Step 5: Solve for x
    x = 3,744,312,992.06/54,345.90
  6. Step 6: Final answer
    x = 68,897.80

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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.