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Finding the Fourth Proportional to 70,885.60, 106,328.40 and 28,765.60

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Solution

The fourth proportional to 70,885.60, 106,328.40 and 28,765.60 is: 43,148.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,885.60 : 106,328.40 = 28,765.60 : x
  2. Step 2: Convert to fraction form
    70,885.60/106,328.40 = 28,765.60/x
  3. Step 3: Cross multiply
    70,885.60x = 106,328.40 × 28,765.60
  4. Step 4: Simplify right side
    70,885.60x = 3,058,600,223.04
  5. Step 5: Solve for x
    x = 3,058,600,223.04/70,885.60
  6. Step 6: Final answer
    x = 43,148.40

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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.