Home / 129,621,445.86-178,891,457.61-79,418,980.95

Finding the Fourth Proportional to 129,621,445.86, 178,891,457.61 and 79,418,980.95

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Solution

The fourth proportional to 129,621,445.86, 178,891,457.61 and 79,418,980.95 is: 109,606,687.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,621,445.86 : 178,891,457.61 = 79,418,980.95 : x
  2. Step 2: Convert to fraction form
    129,621,445.86/178,891,457.61 = 79,418,980.95/x
  3. Step 3: Cross multiply
    129,621,445.86x = 178,891,457.61 × 79,418,980.95
  4. Step 4: Simplify right side
    129,621,445.86x = 14,207,377,263,673,302
  5. Step 5: Solve for x
    x = 14,207,377,263,673,302/129,621,445.86
  6. Step 6: Final answer
    x = 109,606,687.14

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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.