Home / 128,404.80-177,199.02-71,812.50

Finding the Fourth Proportional to 128,404.80, 177,199.02 and 71,812.50

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Solution

The fourth proportional to 128,404.80, 177,199.02 and 71,812.50 is: 99,101.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,404.80 : 177,199.02 = 71,812.50 : x
  2. Step 2: Convert to fraction form
    128,404.80/177,199.02 = 71,812.50/x
  3. Step 3: Cross multiply
    128,404.80x = 177,199.02 × 71,812.50
  4. Step 4: Simplify right side
    128,404.80x = 12,725,104,623.75
  5. Step 5: Solve for x
    x = 12,725,104,623.75/128,404.80
  6. Step 6: Final answer
    x = 99,101.47

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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.