Home / 42,768,007.20-64,152,010.80-21,205,936.80

Finding the Fourth Proportional to 42,768,007.20, 64,152,010.80 and 21,205,936.80

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Solution

The fourth proportional to 42,768,007.20, 64,152,010.80 and 21,205,936.80 is: 31,808,905.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,768,007.20 : 64,152,010.80 = 21,205,936.80 : x
  2. Step 2: Convert to fraction form
    42,768,007.20/64,152,010.80 = 21,205,936.80/x
  3. Step 3: Cross multiply
    42,768,007.20x = 64,152,010.80 × 21,205,936.80
  4. Step 4: Simplify right side
    42,768,007.20x = 1,360,403,486,617,717.50
  5. Step 5: Solve for x
    x = 1,360,403,486,617,717.50/42,768,007.20
  6. Step 6: Final answer
    x = 31,808,905.20

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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.