Home / 72,731,920.63-100,372,176.40-39,694,290.12

Finding the Fourth Proportional to 72,731,920.63, 100,372,176.40 and 39,694,290.12

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Solution

The fourth proportional to 72,731,920.63, 100,372,176.40 and 39,694,290.12 is: 54,779,280.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,731,920.63 : 100,372,176.40 = 39,694,290.12 : x
  2. Step 2: Convert to fraction form
    72,731,920.63/100,372,176.40 = 39,694,290.12/x
  3. Step 3: Cross multiply
    72,731,920.63x = 100,372,176.40 × 39,694,290.12
  4. Step 4: Simplify right side
    72,731,920.63x = 3,984,202,290,143,216
  5. Step 5: Solve for x
    x = 3,984,202,290,143,216/72,731,920.63
  6. Step 6: Final answer
    x = 54,779,280.62

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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.