Home / 57,078,728.40-78,768,245.68-30,972,582.32

Finding the Fourth Proportional to 57,078,728.40, 78,768,245.68 and 30,972,582.32

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Solution

The fourth proportional to 57,078,728.40, 78,768,245.68 and 30,972,582.32 is: 42,741,946.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,078,728.40 : 78,768,245.68 = 30,972,582.32 : x
  2. Step 2: Convert to fraction form
    57,078,728.40/78,768,245.68 = 30,972,582.32/x
  3. Step 3: Cross multiply
    57,078,728.40x = 78,768,245.68 × 30,972,582.32
  4. Step 4: Simplify right side
    57,078,728.40x = 2,439,655,973,525,784.50
  5. Step 5: Solve for x
    x = 2,439,655,973,525,784.50/57,078,728.40
  6. Step 6: Final answer
    x = 42,741,946.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.