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Finding the Fourth Proportional to 129,804.75, 179,130.56 and 70,188.75

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Solution

The fourth proportional to 129,804.75, 179,130.56 and 70,188.75 is: 96,860.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,804.75 : 179,130.56 = 70,188.75 : x
  2. Step 2: Convert to fraction form
    129,804.75/179,130.56 = 70,188.75/x
  3. Step 3: Cross multiply
    129,804.75x = 179,130.56 × 70,188.75
  4. Step 4: Simplify right side
    129,804.75x = 12,572,949,742.26
  5. Step 5: Solve for x
    x = 12,572,949,742.26/129,804.75
  6. Step 6: Final answer
    x = 96,860.48

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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.