Home / 85,505.02-128,253.88-83,502.70

Finding the Fourth Proportional to 85,505.02, 128,253.88 and 83,502.70

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Solution

The fourth proportional to 85,505.02, 128,253.88 and 83,502.70 is: 125,250.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,505.02 : 128,253.88 = 83,502.70 : x
  2. Step 2: Convert to fraction form
    85,505.02/128,253.88 = 83,502.70/x
  3. Step 3: Cross multiply
    85,505.02x = 128,253.88 × 83,502.70
  4. Step 4: Simplify right side
    85,505.02x = 10,709,545,049.22
  5. Step 5: Solve for x
    x = 10,709,545,049.22/85,505.02
  6. Step 6: Final answer
    x = 125,250.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.