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Finding the Fourth Proportional to 86,046.34, 118,739.78 and 47,808.30

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Solution

The fourth proportional to 86,046.34, 118,739.78 and 47,808.30 is: 65,973.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,046.34 : 118,739.78 = 47,808.30 : x
  2. Step 2: Convert to fraction form
    86,046.34/118,739.78 = 47,808.30/x
  3. Step 3: Cross multiply
    86,046.34x = 118,739.78 × 47,808.30
  4. Step 4: Simplify right side
    86,046.34x = 5,676,747,024.17
  5. Step 5: Solve for x
    x = 5,676,747,024.17/86,046.34
  6. Step 6: Final answer
    x = 65,973.14

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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.