Home / 129,192.01-178,243.88-78,188.47

Finding the Fourth Proportional to 129,192.01, 178,243.88 and 78,188.47

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Solution

The fourth proportional to 129,192.01, 178,243.88 and 78,188.47 is: 107,875.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,192.01 : 178,243.88 = 78,188.47 : x
  2. Step 2: Convert to fraction form
    129,192.01/178,243.88 = 78,188.47/x
  3. Step 3: Cross multiply
    129,192.01x = 178,243.88 × 78,188.47
  4. Step 4: Simplify right side
    129,192.01x = 13,936,615,427.51
  5. Step 5: Solve for x
    x = 13,936,615,427.51/129,192.01
  6. Step 6: Final answer
    x = 107,875.21

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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.