Home / 129,641.24-178,916.64-75,944.72

Finding the Fourth Proportional to 129,641.24, 178,916.64 and 75,944.72

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Solution

The fourth proportional to 129,641.24, 178,916.64 and 75,944.72 is: 104,810.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,641.24 : 178,916.64 = 75,944.72 : x
  2. Step 2: Convert to fraction form
    129,641.24/178,916.64 = 75,944.72/x
  3. Step 3: Cross multiply
    129,641.24x = 178,916.64 × 75,944.72
  4. Step 4: Simplify right side
    129,641.24x = 13,587,774,128.14
  5. Step 5: Solve for x
    x = 13,587,774,128.14/129,641.24
  6. Step 6: Final answer
    x = 104,810.58

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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.