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Finding the Fourth Proportional to 99,434.94, 137,189.28 and 56,407.32

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Solution

The fourth proportional to 99,434.94, 137,189.28 and 56,407.32 is: 77,824.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,434.94 : 137,189.28 = 56,407.32 : x
  2. Step 2: Convert to fraction form
    99,434.94/137,189.28 = 56,407.32/x
  3. Step 3: Cross multiply
    99,434.94x = 137,189.28 × 56,407.32
  4. Step 4: Simplify right side
    99,434.94x = 7,738,479,617.53
  5. Step 5: Solve for x
    x = 7,738,479,617.53/99,434.94
  6. Step 6: Final answer
    x = 77,824.55

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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.