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Finding the Fourth Proportional to 72,972.40, 109,458.60 and 46,728.40

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Solution

The fourth proportional to 72,972.40, 109,458.60 and 46,728.40 is: 70,092.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,972.40 : 109,458.60 = 46,728.40 : x
  2. Step 2: Convert to fraction form
    72,972.40/109,458.60 = 46,728.40/x
  3. Step 3: Cross multiply
    72,972.40x = 109,458.60 × 46,728.40
  4. Step 4: Simplify right side
    72,972.40x = 5,114,825,244.24
  5. Step 5: Solve for x
    x = 5,114,825,244.24/72,972.40
  6. Step 6: Final answer
    x = 70,092.60

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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.