Home / 123,710.40-185,565.60-57,128.40

Finding the Fourth Proportional to 123,710.40, 185,565.60 and 57,128.40

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Solution

The fourth proportional to 123,710.40, 185,565.60 and 57,128.40 is: 85,692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,710.40 : 185,565.60 = 57,128.40 : x
  2. Step 2: Convert to fraction form
    123,710.40/185,565.60 = 57,128.40/x
  3. Step 3: Cross multiply
    123,710.40x = 185,565.60 × 57,128.40
  4. Step 4: Simplify right side
    123,710.40x = 10,601,065,823.04
  5. Step 5: Solve for x
    x = 10,601,065,823.04/123,710.40
  6. Step 6: Final answer
    x = 85,692.60

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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.