Home / 129,191.69-178,283.73-72,603.07

Finding the Fourth Proportional to 129,191.69, 178,283.73 and 72,603.07

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Solution

The fourth proportional to 129,191.69, 178,283.73 and 72,603.07 is: 100,191.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,191.69 : 178,283.73 = 72,603.07 : x
  2. Step 2: Convert to fraction form
    129,191.69/178,283.73 = 72,603.07/x
  3. Step 3: Cross multiply
    129,191.69x = 178,283.73 × 72,603.07
  4. Step 4: Simplify right side
    129,191.69x = 12,943,945,955.60
  5. Step 5: Solve for x
    x = 12,943,945,955.60/129,191.69
  6. Step 6: Final answer
    x = 100,191.78

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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.