Home / 129,308.60-178,411-75,606.82

Finding the Fourth Proportional to 129,308.60, 178,411 and 75,606.82

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Solution

The fourth proportional to 129,308.60, 178,411 and 75,606.82 is: 104,317.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,308.60 : 178,411 = 75,606.82 : x
  2. Step 2: Convert to fraction form
    129,308.60/178,411 = 75,606.82/x
  3. Step 3: Cross multiply
    129,308.60x = 178,411 × 75,606.82
  4. Step 4: Simplify right side
    129,308.60x = 13,489,088,363.02
  5. Step 5: Solve for x
    x = 13,489,088,363.02/129,308.60
  6. Step 6: Final answer
    x = 104,317.02

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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.