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Finding the Fourth Proportional to 98,776, 136,310.88 and 54,064

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Solution

The fourth proportional to 98,776, 136,310.88 and 54,064 is: 74,608.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,776 : 136,310.88 = 54,064 : x
  2. Step 2: Convert to fraction form
    98,776/136,310.88 = 54,064/x
  3. Step 3: Cross multiply
    98,776x = 136,310.88 × 54,064
  4. Step 4: Simplify right side
    98,776x = 7,369,511,416.32
  5. Step 5: Solve for x
    x = 7,369,511,416.32/98,776
  6. Step 6: Final answer
    x = 74,608.32

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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.