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Finding the Fourth Proportional to 99,247.82, 136,973.76 and 56,820.02

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Solution

The fourth proportional to 99,247.82, 136,973.76 and 56,820.02 is: 78,418.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,247.82 : 136,973.76 = 56,820.02 : x
  2. Step 2: Convert to fraction form
    99,247.82/136,973.76 = 56,820.02/x
  3. Step 3: Cross multiply
    99,247.82x = 136,973.76 × 56,820.02
  4. Step 4: Simplify right side
    99,247.82x = 7,782,851,782.68
  5. Step 5: Solve for x
    x = 7,782,851,782.68/99,247.82
  6. Step 6: Final answer
    x = 78,418.37

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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.