Home / 128,099.36-176,777.10-71,510.74

Finding the Fourth Proportional to 128,099.36, 176,777.10 and 71,510.74

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Solution

The fourth proportional to 128,099.36, 176,777.10 and 71,510.74 is: 98,684.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,099.36 : 176,777.10 = 71,510.74 : x
  2. Step 2: Convert to fraction form
    128,099.36/176,777.10 = 71,510.74/x
  3. Step 3: Cross multiply
    128,099.36x = 176,777.10 × 71,510.74
  4. Step 4: Simplify right side
    128,099.36x = 12,641,461,236.05
  5. Step 5: Solve for x
    x = 12,641,461,236.05/128,099.36
  6. Step 6: Final answer
    x = 98,684.81

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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.