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Finding the Fourth Proportional to 129,646.60, 178,912.42 and 70,030.60

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Solution

The fourth proportional to 129,646.60, 178,912.42 and 70,030.60 is: 96,642.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,646.60 : 178,912.42 = 70,030.60 : x
  2. Step 2: Convert to fraction form
    129,646.60/178,912.42 = 70,030.60/x
  3. Step 3: Cross multiply
    129,646.60x = 178,912.42 × 70,030.60
  4. Step 4: Simplify right side
    129,646.60x = 12,529,344,120.05
  5. Step 5: Solve for x
    x = 12,529,344,120.05/129,646.60
  6. Step 6: Final answer
    x = 96,642.29

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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.