Home / 129,658.07-178,911.83-72,283.34

Finding the Fourth Proportional to 129,658.07, 178,911.83 and 72,283.34

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Solution

The fourth proportional to 129,658.07, 178,911.83 and 72,283.34 is: 99,741.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,658.07 : 178,911.83 = 72,283.34 : x
  2. Step 2: Convert to fraction form
    129,658.07/178,911.83 = 72,283.34/x
  3. Step 3: Cross multiply
    129,658.07x = 178,911.83 × 72,283.34
  4. Step 4: Simplify right side
    129,658.07x = 12,932,343,924.06
  5. Step 5: Solve for x
    x = 12,932,343,924.06/129,658.07
  6. Step 6: Final answer
    x = 99,741.92

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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.