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Finding the Fourth Proportional to 85,655.80, 118,203.98 and 47,930.36

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Solution

The fourth proportional to 85,655.80, 118,203.98 and 47,930.36 is: 66,143.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,655.80 : 118,203.98 = 47,930.36 : x
  2. Step 2: Convert to fraction form
    85,655.80/118,203.98 = 47,930.36/x
  3. Step 3: Cross multiply
    85,655.80x = 118,203.98 × 47,930.36
  4. Step 4: Simplify right side
    85,655.80x = 5,665,559,314.83
  5. Step 5: Solve for x
    x = 5,665,559,314.83/85,655.80
  6. Step 6: Final answer
    x = 66,143.32

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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.