Home / 122,720.48-169,287.08-79,126.64

Finding the Fourth Proportional to 122,720.48, 169,287.08 and 79,126.64

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Solution

The fourth proportional to 122,720.48, 169,287.08 and 79,126.64 is: 109,151.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,720.48 : 169,287.08 = 79,126.64 : x
  2. Step 2: Convert to fraction form
    122,720.48/169,287.08 = 79,126.64/x
  3. Step 3: Cross multiply
    122,720.48x = 169,287.08 × 79,126.64
  4. Step 4: Simplify right side
    122,720.48x = 13,395,117,835.81
  5. Step 5: Solve for x
    x = 13,395,117,835.81/122,720.48
  6. Step 6: Final answer
    x = 109,151.45

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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.