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Finding the Fourth Proportional to 70,894.80, 106,342.20 and 57,772.80

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Solution

The fourth proportional to 70,894.80, 106,342.20 and 57,772.80 is: 86,659.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,894.80 : 106,342.20 = 57,772.80 : x
  2. Step 2: Convert to fraction form
    70,894.80/106,342.20 = 57,772.80/x
  3. Step 3: Cross multiply
    70,894.80x = 106,342.20 × 57,772.80
  4. Step 4: Simplify right side
    70,894.80x = 6,143,686,652.16
  5. Step 5: Solve for x
    x = 6,143,686,652.16/70,894.80
  6. Step 6: Final answer
    x = 86,659.20

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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.