Home / 122,699.13-169,323.80-77,406.36

Finding the Fourth Proportional to 122,699.13, 169,323.80 and 77,406.36

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Solution

The fourth proportional to 122,699.13, 169,323.80 and 77,406.36 is: 106,820.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,699.13 : 169,323.80 = 77,406.36 : x
  2. Step 2: Convert to fraction form
    122,699.13/169,323.80 = 77,406.36/x
  3. Step 3: Cross multiply
    122,699.13x = 169,323.80 × 77,406.36
  4. Step 4: Simplify right side
    122,699.13x = 13,106,738,632.34
  5. Step 5: Solve for x
    x = 13,106,738,632.34/122,699.13
  6. Step 6: Final answer
    x = 106,820.14

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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.