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Finding the Fourth Proportional to 129,804, 179,129.52 and 70,188

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Solution

The fourth proportional to 129,804, 179,129.52 and 70,188 is: 96,859.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,804 : 179,129.52 = 70,188 : x
  2. Step 2: Convert to fraction form
    129,804/179,129.52 = 70,188/x
  3. Step 3: Cross multiply
    129,804x = 179,129.52 × 70,188
  4. Step 4: Simplify right side
    129,804x = 12,572,742,749.76
  5. Step 5: Solve for x
    x = 12,572,742,749.76/129,804
  6. Step 6: Final answer
    x = 96,859.44

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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.