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Finding the Fourth Proportional to 101,505.20, 152,257.80 and 31,391.60

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Solution

The fourth proportional to 101,505.20, 152,257.80 and 31,391.60 is: 47,087.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,505.20 : 152,257.80 = 31,391.60 : x
  2. Step 2: Convert to fraction form
    101,505.20/152,257.80 = 31,391.60/x
  3. Step 3: Cross multiply
    101,505.20x = 152,257.80 × 31,391.60
  4. Step 4: Simplify right side
    101,505.20x = 4,779,615,954.48
  5. Step 5: Solve for x
    x = 4,779,615,954.48/101,505.20
  6. Step 6: Final answer
    x = 47,087.40

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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.