Home / 128,929.50-177,923.93-72,342.09

Finding the Fourth Proportional to 128,929.50, 177,923.93 and 72,342.09

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Solution

The fourth proportional to 128,929.50, 177,923.93 and 72,342.09 is: 99,832.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,929.50 : 177,923.93 = 72,342.09 : x
  2. Step 2: Convert to fraction form
    128,929.50/177,923.93 = 72,342.09/x
  3. Step 3: Cross multiply
    128,929.50x = 177,923.93 × 72,342.09
  4. Step 4: Simplify right side
    128,929.50x = 12,871,388,595.50
  5. Step 5: Solve for x
    x = 12,871,388,595.50/128,929.50
  6. Step 6: Final answer
    x = 99,832.77

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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.