Home / 121,919,991.44-168,206,153.52-72,322,374.40

Finding the Fourth Proportional to 121,919,991.44, 168,206,153.52 and 72,322,374.40

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Solution

The fourth proportional to 121,919,991.44, 168,206,153.52 and 72,322,374.40 is: 99,779,111.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,919,991.44 : 168,206,153.52 = 72,322,374.40 : x
  2. Step 2: Convert to fraction form
    121,919,991.44/168,206,153.52 = 72,322,374.40/x
  3. Step 3: Cross multiply
    121,919,991.44x = 168,206,153.52 × 72,322,374.40
  4. Step 4: Simplify right side
    121,919,991.44x = 12,165,068,411,257,320
  5. Step 5: Solve for x
    x = 12,165,068,411,257,320/121,919,991.44
  6. Step 6: Final answer
    x = 99,779,111.43

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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.