Home / 129,309.10-178,411.68-75,607.32

Finding the Fourth Proportional to 129,309.10, 178,411.68 and 75,607.32

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Solution

The fourth proportional to 129,309.10, 178,411.68 and 75,607.32 is: 104,317.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,309.10 : 178,411.68 = 75,607.32 : x
  2. Step 2: Convert to fraction form
    129,309.10/178,411.68 = 75,607.32/x
  3. Step 3: Cross multiply
    129,309.10x = 178,411.68 × 75,607.32
  4. Step 4: Simplify right side
    129,309.10x = 13,489,228,981.50
  5. Step 5: Solve for x
    x = 13,489,228,981.50/129,309.10
  6. Step 6: Final answer
    x = 104,317.71

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1.5x scale

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.