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Finding the Fourth Proportional to 130,672.84, 180,383.70 and 88,288.78

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Solution

The fourth proportional to 130,672.84, 180,383.70 and 88,288.78 is: 121,875.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,672.84 : 180,383.70 = 88,288.78 : x
  2. Step 2: Convert to fraction form
    130,672.84/180,383.70 = 88,288.78/x
  3. Step 3: Cross multiply
    130,672.84x = 180,383.70 × 88,288.78
  4. Step 4: Simplify right side
    130,672.84x = 15,925,856,804.89
  5. Step 5: Solve for x
    x = 15,925,856,804.89/130,672.84
  6. Step 6: Final answer
    x = 121,875.80

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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.