Home / 129,393.12-178,548.06-72,803.28

Finding the Fourth Proportional to 129,393.12, 178,548.06 and 72,803.28

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Solution

The fourth proportional to 129,393.12, 178,548.06 and 72,803.28 is: 100,460.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,393.12 : 178,548.06 = 72,803.28 : x
  2. Step 2: Convert to fraction form
    129,393.12/178,548.06 = 72,803.28/x
  3. Step 3: Cross multiply
    129,393.12x = 178,548.06 × 72,803.28
  4. Step 4: Simplify right side
    129,393.12x = 12,998,884,405.64
  5. Step 5: Solve for x
    x = 12,998,884,405.64/129,393.12
  6. Step 6: Final answer
    x = 100,460.40

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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.