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Finding the Fourth Proportional to 99,281.80, 137,008.95 and 56,840.63

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Solution

The fourth proportional to 99,281.80, 137,008.95 and 56,840.63 is: 78,440.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,281.80 : 137,008.95 = 56,840.63 : x
  2. Step 2: Convert to fraction form
    99,281.80/137,008.95 = 56,840.63/x
  3. Step 3: Cross multiply
    99,281.80x = 137,008.95 × 56,840.63
  4. Step 4: Simplify right side
    99,281.80x = 7,787,675,033.64
  5. Step 5: Solve for x
    x = 7,787,675,033.64/99,281.80
  6. Step 6: Final answer
    x = 78,440.11

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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.