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Finding the Fourth Proportional to 64,975.86, 97,385.30 and 31,645.98

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Solution

The fourth proportional to 64,975.86, 97,385.30 and 31,645.98 is: 47,430.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,975.86 : 97,385.30 = 31,645.98 : x
  2. Step 2: Convert to fraction form
    64,975.86/97,385.30 = 31,645.98/x
  3. Step 3: Cross multiply
    64,975.86x = 97,385.30 × 31,645.98
  4. Step 4: Simplify right side
    64,975.86x = 3,081,853,256.09
  5. Step 5: Solve for x
    x = 3,081,853,256.09/64,975.86
  6. Step 6: Final answer
    x = 47,430.74

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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.