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Finding the Fourth Proportional to 99,379.84, 137,148.96 and 56,938.48

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Solution

The fourth proportional to 99,379.84, 137,148.96 and 56,938.48 is: 78,577.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,379.84 : 137,148.96 = 56,938.48 : x
  2. Step 2: Convert to fraction form
    99,379.84/137,148.96 = 56,938.48/x
  3. Step 3: Cross multiply
    99,379.84x = 137,148.96 × 56,938.48
  4. Step 4: Simplify right side
    99,379.84x = 7,809,053,315.98
  5. Step 5: Solve for x
    x = 7,809,053,315.98/99,379.84
  6. Step 6: Final answer
    x = 78,577.84

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1.5x scale

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.