Home / 78,741,569.20-118,112,353.80-30,872,513.20

Finding the Fourth Proportional to 78,741,569.20, 118,112,353.80 and 30,872,513.20

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Solution

The fourth proportional to 78,741,569.20, 118,112,353.80 and 30,872,513.20 is: 46,308,769.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,741,569.20 : 118,112,353.80 = 30,872,513.20 : x
  2. Step 2: Convert to fraction form
    78,741,569.20/118,112,353.80 = 30,872,513.20/x
  3. Step 3: Cross multiply
    78,741,569.20x = 118,112,353.80 × 30,872,513.20
  4. Step 4: Simplify right side
    78,741,569.20x = 3,646,425,201,773,570
  5. Step 5: Solve for x
    x = 3,646,425,201,773,570/78,741,569.20
  6. Step 6: Final answer
    x = 46,308,769.80

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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.