Home / 387,086,699.60-580,617,607.80-128,313,861.20

Finding the Fourth Proportional to 387,086,699.60, 580,617,607.80 and 128,313,861.20

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Solution

The fourth proportional to 387,086,699.60, 580,617,607.80 and 128,313,861.20 is: 192,466,667.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,086,699.60 : 580,617,607.80 = 128,313,861.20 : x
  2. Step 2: Convert to fraction form
    387,086,699.60/580,617,607.80 = 128,313,861.20/x
  3. Step 3: Cross multiply
    387,086,699.60x = 580,617,607.80 × 128,313,861.20
  4. Step 4: Simplify right side
    387,086,699.60x = 74,501,287,137,525,232
  5. Step 5: Solve for x
    x = 74,501,287,137,525,232/387,086,699.60
  6. Step 6: Final answer
    x = 192,466,667.58

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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.