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Finding the Fourth Proportional to 129,638.40, 194,457.60 and 118,557.60

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Solution

The fourth proportional to 129,638.40, 194,457.60 and 118,557.60 is: 177,836.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,638.40 : 194,457.60 = 118,557.60 : x
  2. Step 2: Convert to fraction form
    129,638.40/194,457.60 = 118,557.60/x
  3. Step 3: Cross multiply
    129,638.40x = 194,457.60 × 118,557.60
  4. Step 4: Simplify right side
    129,638.40x = 23,054,426,357.76
  5. Step 5: Solve for x
    x = 23,054,426,357.76/129,638.40
  6. Step 6: Final answer
    x = 177,836.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.