Home / 129,177.51-178,294.95-81,496.05

Finding the Fourth Proportional to 129,177.51, 178,294.95 and 81,496.05

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Solution

The fourth proportional to 129,177.51, 178,294.95 and 81,496.05 is: 112,483.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,177.51 : 178,294.95 = 81,496.05 : x
  2. Step 2: Convert to fraction form
    129,177.51/178,294.95 = 81,496.05/x
  3. Step 3: Cross multiply
    129,177.51x = 178,294.95 × 81,496.05
  4. Step 4: Simplify right side
    129,177.51x = 14,530,334,159.95
  5. Step 5: Solve for x
    x = 14,530,334,159.95/129,177.51
  6. Step 6: Final answer
    x = 112,483.47

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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.