Home / 85,669,308.72-128,394,788.04-40,130,719.92

Finding the Fourth Proportional to 85,669,308.72, 128,394,788.04 and 40,130,719.92

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Solution

The fourth proportional to 85,669,308.72, 128,394,788.04 and 40,130,719.92 is: 60,144,938.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,669,308.72 : 128,394,788.04 = 40,130,719.92 : x
  2. Step 2: Convert to fraction form
    85,669,308.72/128,394,788.04 = 40,130,719.92/x
  3. Step 3: Cross multiply
    85,669,308.72x = 128,394,788.04 × 40,130,719.92
  4. Step 4: Simplify right side
    85,669,308.72x = 5,152,575,278,021,006
  5. Step 5: Solve for x
    x = 5,152,575,278,021,006/85,669,308.72
  6. Step 6: Final answer
    x = 60,144,938.19

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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.