Home / 122,971.21-169,712.38-71,980.85

Finding the Fourth Proportional to 122,971.21, 169,712.38 and 71,980.85

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Solution

The fourth proportional to 122,971.21, 169,712.38 and 71,980.85 is: 99,340.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,971.21 : 169,712.38 = 71,980.85 : x
  2. Step 2: Convert to fraction form
    122,971.21/169,712.38 = 71,980.85/x
  3. Step 3: Cross multiply
    122,971.21x = 169,712.38 × 71,980.85
  4. Step 4: Simplify right side
    122,971.21x = 12,216,041,578.51
  5. Step 5: Solve for x
    x = 12,216,041,578.51/122,971.21
  6. Step 6: Final answer
    x = 99,340.66

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1.5x scale

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.