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Finding the Fourth Proportional to 130,863.60, 180,540.90 and 77,063.40

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Solution

The fourth proportional to 130,863.60, 180,540.90 and 77,063.40 is: 106,317.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,863.60 : 180,540.90 = 77,063.40 : x
  2. Step 2: Convert to fraction form
    130,863.60/180,540.90 = 77,063.40/x
  3. Step 3: Cross multiply
    130,863.60x = 180,540.90 × 77,063.40
  4. Step 4: Simplify right side
    130,863.60x = 13,913,095,593.06
  5. Step 5: Solve for x
    x = 13,913,095,593.06/130,863.60
  6. Step 6: Final answer
    x = 106,317.54

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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.