Home / 129,208.16-178,322.04-71,853.20

Finding the Fourth Proportional to 129,208.16, 178,322.04 and 71,853.20

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Solution

The fourth proportional to 129,208.16, 178,322.04 and 71,853.20 is: 99,165.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,208.16 : 178,322.04 = 71,853.20 : x
  2. Step 2: Convert to fraction form
    129,208.16/178,322.04 = 71,853.20/x
  3. Step 3: Cross multiply
    129,208.16x = 178,322.04 × 71,853.20
  4. Step 4: Simplify right side
    129,208.16x = 12,813,009,204.53
  5. Step 5: Solve for x
    x = 12,813,009,204.53/129,208.16
  6. Step 6: Final answer
    x = 99,165.63

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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.