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Finding the Fourth Proportional to 76,172.62, 105,085.62 and 45,940.74

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Solution

The fourth proportional to 76,172.62, 105,085.62 and 45,940.74 is: 63,378.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,172.62 : 105,085.62 = 45,940.74 : x
  2. Step 2: Convert to fraction form
    76,172.62/105,085.62 = 45,940.74/x
  3. Step 3: Cross multiply
    76,172.62x = 105,085.62 × 45,940.74
  4. Step 4: Simplify right side
    76,172.62x = 4,827,711,146.16
  5. Step 5: Solve for x
    x = 4,827,711,146.16/76,172.62
  6. Step 6: Final answer
    x = 63,378.56

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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.