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Finding the Fourth Proportional to 98,360.76, 135,730.44 and 55,911

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Solution

The fourth proportional to 98,360.76, 135,730.44 and 55,911 is: 77,152.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,360.76 : 135,730.44 = 55,911 : x
  2. Step 2: Convert to fraction form
    98,360.76/135,730.44 = 55,911/x
  3. Step 3: Cross multiply
    98,360.76x = 135,730.44 × 55,911
  4. Step 4: Simplify right side
    98,360.76x = 7,588,824,630.84
  5. Step 5: Solve for x
    x = 7,588,824,630.84/98,360.76
  6. Step 6: Final answer
    x = 77,152.97

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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.