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Finding the Fourth Proportional to 72,021.40, 107,772.90 and 48,693.40

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Solution

The fourth proportional to 72,021.40, 107,772.90 and 48,693.40 is: 72,864.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,021.40 : 107,772.90 = 48,693.40 : x
  2. Step 2: Convert to fraction form
    72,021.40/107,772.90 = 48,693.40/x
  3. Step 3: Cross multiply
    72,021.40x = 107,772.90 × 48,693.40
  4. Step 4: Simplify right side
    72,021.40x = 5,247,828,928.86
  5. Step 5: Solve for x
    x = 5,247,828,928.86/72,021.40
  6. Step 6: Final answer
    x = 72,864.86

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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.