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Finding the Fourth Proportional to 119,117.76, 178,670.88 and 45,240

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Solution

The fourth proportional to 119,117.76, 178,670.88 and 45,240 is: 67,857.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,117.76 : 178,670.88 = 45,240 : x
  2. Step 2: Convert to fraction form
    119,117.76/178,670.88 = 45,240/x
  3. Step 3: Cross multiply
    119,117.76x = 178,670.88 × 45,240
  4. Step 4: Simplify right side
    119,117.76x = 8,083,070,611.20
  5. Step 5: Solve for x
    x = 8,083,070,611.20/119,117.76
  6. Step 6: Final answer
    x = 67,857.81

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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.