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Finding the Fourth Proportional to 115,913.60, 173,870.40 and 45,756.80

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Solution

The fourth proportional to 115,913.60, 173,870.40 and 45,756.80 is: 68,635.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,913.60 : 173,870.40 = 45,756.80 : x
  2. Step 2: Convert to fraction form
    115,913.60/173,870.40 = 45,756.80/x
  3. Step 3: Cross multiply
    115,913.60x = 173,870.40 × 45,756.80
  4. Step 4: Simplify right side
    115,913.60x = 7,955,753,118.72
  5. Step 5: Solve for x
    x = 7,955,753,118.72/115,913.60
  6. Step 6: Final answer
    x = 68,635.20

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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.