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Finding the Fourth Proportional to 128,052.40, 191,641.20 and 117,554.80

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Solution

The fourth proportional to 128,052.40, 191,641.20 and 117,554.80 is: 175,930.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,052.40 : 191,641.20 = 117,554.80 : x
  2. Step 2: Convert to fraction form
    128,052.40/191,641.20 = 117,554.80/x
  3. Step 3: Cross multiply
    128,052.40x = 191,641.20 × 117,554.80
  4. Step 4: Simplify right side
    128,052.40x = 22,528,342,937.76
  5. Step 5: Solve for x
    x = 22,528,342,937.76/128,052.40
  6. Step 6: Final answer
    x = 175,930.66

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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.