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Finding the Fourth Proportional to 99,742.86, 137,644.44 and 56,722.32

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Solution

The fourth proportional to 99,742.86, 137,644.44 and 56,722.32 is: 78,276.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,742.86 : 137,644.44 = 56,722.32 : x
  2. Step 2: Convert to fraction form
    99,742.86/137,644.44 = 56,722.32/x
  3. Step 3: Cross multiply
    99,742.86x = 137,644.44 × 56,722.32
  4. Step 4: Simplify right side
    99,742.86x = 7,807,511,688.29
  5. Step 5: Solve for x
    x = 7,807,511,688.29/99,742.86
  6. Step 6: Final answer
    x = 78,276.40

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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.