Home / 128,205.55-176,934-70,849.92

Finding the Fourth Proportional to 128,205.55, 176,934 and 70,849.92

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Solution

The fourth proportional to 128,205.55, 176,934 and 70,849.92 is: 97,778.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,205.55 : 176,934 = 70,849.92 : x
  2. Step 2: Convert to fraction form
    128,205.55/176,934 = 70,849.92/x
  3. Step 3: Cross multiply
    128,205.55x = 176,934 × 70,849.92
  4. Step 4: Simplify right side
    128,205.55x = 12,535,759,745.28
  5. Step 5: Solve for x
    x = 12,535,759,745.28/128,205.55
  6. Step 6: Final answer
    x = 97,778.60

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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.