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Finding the Fourth Proportional to 99,279.90, 137,008.86 and 56,852.10

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Solution

The fourth proportional to 99,279.90, 137,008.86 and 56,852.10 is: 78,457.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,279.90 : 137,008.86 = 56,852.10 : x
  2. Step 2: Convert to fraction form
    99,279.90/137,008.86 = 56,852.10/x
  3. Step 3: Cross multiply
    99,279.90x = 137,008.86 × 56,852.10
  4. Step 4: Simplify right side
    99,279.90x = 7,789,241,409.61
  5. Step 5: Solve for x
    x = 7,789,241,409.61/99,279.90
  6. Step 6: Final answer
    x = 78,457.39

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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.