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Finding the Fourth Proportional to 317,969.70, 476,954.55 and 81,330.90

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Solution

The fourth proportional to 317,969.70, 476,954.55 and 81,330.90 is: 121,996.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,969.70 : 476,954.55 = 81,330.90 : x
  2. Step 2: Convert to fraction form
    317,969.70/476,954.55 = 81,330.90/x
  3. Step 3: Cross multiply
    317,969.70x = 476,954.55 × 81,330.90
  4. Step 4: Simplify right side
    317,969.70x = 38,791,142,810.60
  5. Step 5: Solve for x
    x = 38,791,142,810.60/317,969.70
  6. Step 6: Final answer
    x = 121,996.35

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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.