Home / 115,603.20-159,667.20-77,817.60

Finding the Fourth Proportional to 115,603.20, 159,667.20 and 77,817.60

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Solution

The fourth proportional to 115,603.20, 159,667.20 and 77,817.60 is: 107,479.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,603.20 : 159,667.20 = 77,817.60 : x
  2. Step 2: Convert to fraction form
    115,603.20/159,667.20 = 77,817.60/x
  3. Step 3: Cross multiply
    115,603.20x = 159,667.20 × 77,817.60
  4. Step 4: Simplify right side
    115,603.20x = 12,424,918,302.72
  5. Step 5: Solve for x
    x = 12,424,918,302.72/115,603.20
  6. Step 6: Final answer
    x = 107,479.02

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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.