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Finding the Fourth Proportional to 105,657.62, 145,794.53 and 66,880.28

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Solution

The fourth proportional to 105,657.62, 145,794.53 and 66,880.28 is: 92,286.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,657.62 : 145,794.53 = 66,880.28 : x
  2. Step 2: Convert to fraction form
    105,657.62/145,794.53 = 66,880.28/x
  3. Step 3: Cross multiply
    105,657.62x = 145,794.53 × 66,880.28
  4. Step 4: Simplify right side
    105,657.62x = 9,750,779,520.56
  5. Step 5: Solve for x
    x = 9,750,779,520.56/105,657.62
  6. Step 6: Final answer
    x = 92,286.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.