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Finding the Fourth Proportional to 64,597.86, 89,147.07 and 39,108.90

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Solution

The fourth proportional to 64,597.86, 89,147.07 and 39,108.90 is: 53,971.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,597.86 : 89,147.07 = 39,108.90 : x
  2. Step 2: Convert to fraction form
    64,597.86/89,147.07 = 39,108.90/x
  3. Step 3: Cross multiply
    64,597.86x = 89,147.07 × 39,108.90
  4. Step 4: Simplify right side
    64,597.86x = 3,486,443,845.92
  5. Step 5: Solve for x
    x = 3,486,443,845.92/64,597.86
  6. Step 6: Final answer
    x = 53,971.51

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1.5x scale

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.