Home / 72,439,931.20-108,665,145.60-43,624,019.20

Finding the Fourth Proportional to 72,439,931.20, 108,665,145.60 and 43,624,019.20

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Solution

The fourth proportional to 72,439,931.20, 108,665,145.60 and 43,624,019.20 is: 65,439,189.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,439,931.20 : 108,665,145.60 = 43,624,019.20 : x
  2. Step 2: Convert to fraction form
    72,439,931.20/108,665,145.60 = 43,624,019.20/x
  3. Step 3: Cross multiply
    72,439,931.20x = 108,665,145.60 × 43,624,019.20
  4. Step 4: Simplify right side
    72,439,931.20x = 4,740,410,398,025,196
  5. Step 5: Solve for x
    x = 4,740,410,398,025,196/72,439,931.20
  6. Step 6: Final answer
    x = 65,439,189.68

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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.