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Finding the Fourth Proportional to 115,353.70, 173,030.55 and 85,829.20

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Solution

The fourth proportional to 115,353.70, 173,030.55 and 85,829.20 is: 128,743.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,353.70 : 173,030.55 = 85,829.20 : x
  2. Step 2: Convert to fraction form
    115,353.70/173,030.55 = 85,829.20/x
  3. Step 3: Cross multiply
    115,353.70x = 173,030.55 × 85,829.20
  4. Step 4: Simplify right side
    115,353.70x = 14,851,073,682.06
  5. Step 5: Solve for x
    x = 14,851,073,682.06/115,353.70
  6. Step 6: Final answer
    x = 128,743.80

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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.