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Finding the Fourth Proportional to 130,801.68, 180,501 and 74,211.92

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Solution

The fourth proportional to 130,801.68, 180,501 and 74,211.92 is: 102,409.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,801.68 : 180,501 = 74,211.92 : x
  2. Step 2: Convert to fraction form
    130,801.68/180,501 = 74,211.92/x
  3. Step 3: Cross multiply
    130,801.68x = 180,501 × 74,211.92
  4. Step 4: Simplify right side
    130,801.68x = 13,395,325,771.92
  5. Step 5: Solve for x
    x = 13,395,325,771.92/130,801.68
  6. Step 6: Final answer
    x = 102,409.43

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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.