Home / 128,289.36-176,923.40-80,547.92

Finding the Fourth Proportional to 128,289.36, 176,923.40 and 80,547.92

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Solution

The fourth proportional to 128,289.36, 176,923.40 and 80,547.92 is: 111,083.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,289.36 : 176,923.40 = 80,547.92 : x
  2. Step 2: Convert to fraction form
    128,289.36/176,923.40 = 80,547.92/x
  3. Step 3: Cross multiply
    128,289.36x = 176,923.40 × 80,547.92
  4. Step 4: Simplify right side
    128,289.36x = 14,250,811,869.33
  5. Step 5: Solve for x
    x = 14,250,811,869.33/128,289.36
  6. Step 6: Final answer
    x = 111,083.35

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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.