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Finding the Fourth Proportional to 64,779.88, 89,418.60 and 37,931.02

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Solution

The fourth proportional to 64,779.88, 89,418.60 and 37,931.02 is: 52,357.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,779.88 : 89,418.60 = 37,931.02 : x
  2. Step 2: Convert to fraction form
    64,779.88/89,418.60 = 37,931.02/x
  3. Step 3: Cross multiply
    64,779.88x = 89,418.60 × 37,931.02
  4. Step 4: Simplify right side
    64,779.88x = 3,391,738,257.88
  5. Step 5: Solve for x
    x = 3,391,738,257.88/64,779.88
  6. Step 6: Final answer
    x = 52,357.90

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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.