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Finding the Fourth Proportional to 123,571.40, 185,357.10 and 83,913.80

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Solution

The fourth proportional to 123,571.40, 185,357.10 and 83,913.80 is: 125,870.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,571.40 : 185,357.10 = 83,913.80 : x
  2. Step 2: Convert to fraction form
    123,571.40/185,357.10 = 83,913.80/x
  3. Step 3: Cross multiply
    123,571.40x = 185,357.10 × 83,913.80
  4. Step 4: Simplify right side
    123,571.40x = 15,554,018,617.98
  5. Step 5: Solve for x
    x = 15,554,018,617.98/123,571.40
  6. Step 6: Final answer
    x = 125,870.70

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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.