Home / 129,023.47-178,068.14-81,276

Finding the Fourth Proportional to 129,023.47, 178,068.14 and 81,276

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Solution

The fourth proportional to 129,023.47, 178,068.14 and 81,276 is: 112,170.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,023.47 : 178,068.14 = 81,276 : x
  2. Step 2: Convert to fraction form
    129,023.47/178,068.14 = 81,276/x
  3. Step 3: Cross multiply
    129,023.47x = 178,068.14 × 81,276
  4. Step 4: Simplify right side
    129,023.47x = 14,472,666,146.64
  5. Step 5: Solve for x
    x = 14,472,666,146.64/129,023.47
  6. Step 6: Final answer
    x = 112,170.80

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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.