Home / 129,643.24-178,919.40-75,946.72

Finding the Fourth Proportional to 129,643.24, 178,919.40 and 75,946.72

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Solution

The fourth proportional to 129,643.24, 178,919.40 and 75,946.72 is: 104,813.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,643.24 : 178,919.40 = 75,946.72 : x
  2. Step 2: Convert to fraction form
    129,643.24/178,919.40 = 75,946.72/x
  3. Step 3: Cross multiply
    129,643.24x = 178,919.40 × 75,946.72
  4. Step 4: Simplify right side
    129,643.24x = 13,588,341,574.37
  5. Step 5: Solve for x
    x = 13,588,341,574.37/129,643.24
  6. Step 6: Final answer
    x = 104,813.34

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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.