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Finding the Fourth Proportional to 85,658.86, 118,207.79 and 47,417.60

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Solution

The fourth proportional to 85,658.86, 118,207.79 and 47,417.60 is: 65,435.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,658.86 : 118,207.79 = 47,417.60 : x
  2. Step 2: Convert to fraction form
    85,658.86/118,207.79 = 47,417.60/x
  3. Step 3: Cross multiply
    85,658.86x = 118,207.79 × 47,417.60
  4. Step 4: Simplify right side
    85,658.86x = 5,605,129,703.10
  5. Step 5: Solve for x
    x = 5,605,129,703.10/85,658.86
  6. Step 6: Final answer
    x = 65,435.49

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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.