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Finding the Fourth Proportional to 84,800.80, 127,215.60 and 45,347.20

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Solution

The fourth proportional to 84,800.80, 127,215.60 and 45,347.20 is: 68,028.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,800.80 : 127,215.60 = 45,347.20 : x
  2. Step 2: Convert to fraction form
    84,800.80/127,215.60 = 45,347.20/x
  3. Step 3: Cross multiply
    84,800.80x = 127,215.60 × 45,347.20
  4. Step 4: Simplify right side
    84,800.80x = 5,768,871,256.32
  5. Step 5: Solve for x
    x = 5,768,871,256.32/84,800.80
  6. Step 6: Final answer
    x = 68,028.50

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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.