Home / 138,485,430.90-191,093,244.93-79,767,192.78

Finding the Fourth Proportional to 138,485,430.90, 191,093,244.93 and 79,767,192.78

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Solution

The fourth proportional to 138,485,430.90, 191,093,244.93 and 79,767,192.78 is: 110,069,135.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,485,430.90 : 191,093,244.93 = 79,767,192.78 : x
  2. Step 2: Convert to fraction form
    138,485,430.90/191,093,244.93 = 79,767,192.78/x
  3. Step 3: Cross multiply
    138,485,430.90x = 191,093,244.93 × 79,767,192.78
  4. Step 4: Simplify right side
    138,485,430.90x = 15,242,971,707,287,068
  5. Step 5: Solve for x
    x = 15,242,971,707,287,068/138,485,430.90
  6. Step 6: Final answer
    x = 110,069,135.85

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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.