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Finding the Fourth Proportional to 99,663.63, 137,547.48 and 56,649.59

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Solution

The fourth proportional to 99,663.63, 137,547.48 and 56,649.59 is: 78,183.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,663.63 : 137,547.48 = 56,649.59 : x
  2. Step 2: Convert to fraction form
    99,663.63/137,547.48 = 56,649.59/x
  3. Step 3: Cross multiply
    99,663.63x = 137,547.48 × 56,649.59
  4. Step 4: Simplify right side
    99,663.63x = 7,792,007,659.80
  5. Step 5: Solve for x
    x = 7,792,007,659.80/99,663.63
  6. Step 6: Final answer
    x = 78,183.06

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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.