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Finding the Fourth Proportional to 130,009.68, 179,411.12 and 72,649.94

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Solution

The fourth proportional to 130,009.68, 179,411.12 and 72,649.94 is: 100,255.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,009.68 : 179,411.12 = 72,649.94 : x
  2. Step 2: Convert to fraction form
    130,009.68/179,411.12 = 72,649.94/x
  3. Step 3: Cross multiply
    130,009.68x = 179,411.12 × 72,649.94
  4. Step 4: Simplify right side
    130,009.68x = 13,034,207,103.33
  5. Step 5: Solve for x
    x = 13,034,207,103.33/130,009.68
  6. Step 6: Final answer
    x = 100,255.67

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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.