Home / 75,715.36-112,989.71-66,500.80

Finding the Fourth Proportional to 75,715.36, 112,989.71 and 66,500.80

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Solution

The fourth proportional to 75,715.36, 112,989.71 and 66,500.80 is: 99,238.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,715.36 : 112,989.71 = 66,500.80 : x
  2. Step 2: Convert to fraction form
    75,715.36/112,989.71 = 66,500.80/x
  3. Step 3: Cross multiply
    75,715.36x = 112,989.71 × 66,500.80
  4. Step 4: Simplify right side
    75,715.36x = 7,513,906,106.77
  5. Step 5: Solve for x
    x = 7,513,906,106.77/75,715.36
  6. Step 6: Final answer
    x = 99,238.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.