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Finding the Fourth Proportional to 99,776.88, 137,701.80 and 74,582.64

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Solution

The fourth proportional to 99,776.88, 137,701.80 and 74,582.64 is: 102,931.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,776.88 : 137,701.80 = 74,582.64 : x
  2. Step 2: Convert to fraction form
    99,776.88/137,701.80 = 74,582.64/x
  3. Step 3: Cross multiply
    99,776.88x = 137,701.80 × 74,582.64
  4. Step 4: Simplify right side
    99,776.88x = 10,270,163,776.75
  5. Step 5: Solve for x
    x = 10,270,163,776.75/99,776.88
  6. Step 6: Final answer
    x = 102,931.30

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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.