Home / 129,659.07-178,913.21-72,284.34

Finding the Fourth Proportional to 129,659.07, 178,913.21 and 72,284.34

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Solution

The fourth proportional to 129,659.07, 178,913.21 and 72,284.34 is: 99,743.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,659.07 : 178,913.21 = 72,284.34 : x
  2. Step 2: Convert to fraction form
    129,659.07/178,913.21 = 72,284.34/x
  3. Step 3: Cross multiply
    129,659.07x = 178,913.21 × 72,284.34
  4. Step 4: Simplify right side
    129,659.07x = 12,932,623,302.13
  5. Step 5: Solve for x
    x = 12,932,623,302.13/129,659.07
  6. Step 6: Final answer
    x = 99,743.30

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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.