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Finding the Fourth Proportional to 113,615.20, 170,421.20 and 51,285.60

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Solution

The fourth proportional to 113,615.20, 170,421.20 and 51,285.60 is: 76,927.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,615.20 : 170,421.20 = 51,285.60 : x
  2. Step 2: Convert to fraction form
    113,615.20/170,421.20 = 51,285.60/x
  3. Step 3: Cross multiply
    113,615.20x = 170,421.20 × 51,285.60
  4. Step 4: Simplify right side
    113,615.20x = 8,740,153,494.72
  5. Step 5: Solve for x
    x = 8,740,153,494.72/113,615.20
  6. Step 6: Final answer
    x = 76,927.68

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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.