Home / 129,303.52-178,439.73-71,945.25

Finding the Fourth Proportional to 129,303.52, 178,439.73 and 71,945.25

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Solution

The fourth proportional to 129,303.52, 178,439.73 and 71,945.25 is: 99,284.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,303.52 : 178,439.73 = 71,945.25 : x
  2. Step 2: Convert to fraction form
    129,303.52/178,439.73 = 71,945.25/x
  3. Step 3: Cross multiply
    129,303.52x = 178,439.73 × 71,945.25
  4. Step 4: Simplify right side
    129,303.52x = 12,837,890,984.78
  5. Step 5: Solve for x
    x = 12,837,890,984.78/129,303.52
  6. Step 6: Final answer
    x = 99,284.93

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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.