Home / 129,203.04-178,268.40-78,883.68

Finding the Fourth Proportional to 129,203.04, 178,268.40 and 78,883.68

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Solution

The fourth proportional to 129,203.04, 178,268.40 and 78,883.68 is: 108,840.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,203.04 : 178,268.40 = 78,883.68 : x
  2. Step 2: Convert to fraction form
    129,203.04/178,268.40 = 78,883.68/x
  3. Step 3: Cross multiply
    129,203.04x = 178,268.40 × 78,883.68
  4. Step 4: Simplify right side
    129,203.04x = 14,062,467,419.71
  5. Step 5: Solve for x
    x = 14,062,467,419.71/129,203.04
  6. Step 6: Final answer
    x = 108,840.07

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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.