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Finding the Fourth Proportional to 130,989.59, 180,765.64 and 71,373.59

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Solution

The fourth proportional to 130,989.59, 180,765.64 and 71,373.59 is: 98,495.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,989.59 : 180,765.64 = 71,373.59 : x
  2. Step 2: Convert to fraction form
    130,989.59/180,765.64 = 71,373.59/x
  3. Step 3: Cross multiply
    130,989.59x = 180,765.64 × 71,373.59
  4. Step 4: Simplify right side
    130,989.59x = 12,901,892,497.01
  5. Step 5: Solve for x
    x = 12,901,892,497.01/130,989.59
  6. Step 6: Final answer
    x = 98,495.56

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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.