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Finding the Fourth Proportional to 76,140.54, 114,207.98 and 19,980.14

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Solution

The fourth proportional to 76,140.54, 114,207.98 and 19,980.14 is: 29,969.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,140.54 : 114,207.98 = 19,980.14 : x
  2. Step 2: Convert to fraction form
    76,140.54/114,207.98 = 19,980.14/x
  3. Step 3: Cross multiply
    76,140.54x = 114,207.98 × 19,980.14
  4. Step 4: Simplify right side
    76,140.54x = 2,281,890,758.58
  5. Step 5: Solve for x
    x = 2,281,890,758.58/76,140.54
  6. Step 6: Final answer
    x = 29,969.46

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1.5x scale

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.