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Finding the Fourth Proportional to 85,646.67, 118,189.83 and 47,407.78

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Solution

The fourth proportional to 85,646.67, 118,189.83 and 47,407.78 is: 65,421.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,646.67 : 118,189.83 = 47,407.78 : x
  2. Step 2: Convert to fraction form
    85,646.67/118,189.83 = 47,407.78/x
  3. Step 3: Cross multiply
    85,646.67x = 118,189.83 × 47,407.78
  4. Step 4: Simplify right side
    85,646.67x = 5,603,117,784.39
  5. Step 5: Solve for x
    x = 5,603,117,784.39/85,646.67
  6. Step 6: Final answer
    x = 65,421.32

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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.