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Finding the Fourth Proportional to 64,890, 97,345.53 and 25,425.72

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Solution

The fourth proportional to 64,890, 97,345.53 and 25,425.72 is: 38,142.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,890 : 97,345.53 = 25,425.72 : x
  2. Step 2: Convert to fraction form
    64,890/97,345.53 = 25,425.72/x
  3. Step 3: Cross multiply
    64,890x = 97,345.53 × 25,425.72
  4. Step 4: Simplify right side
    64,890x = 2,475,080,189.03
  5. Step 5: Solve for x
    x = 2,475,080,189.03/64,890
  6. Step 6: Final answer
    x = 38,142.71

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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.