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Finding the Fourth Proportional to 128,052.90, 192,079.35 and 115,368.30

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Solution

The fourth proportional to 128,052.90, 192,079.35 and 115,368.30 is: 173,052.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,052.90 : 192,079.35 = 115,368.30 : x
  2. Step 2: Convert to fraction form
    128,052.90/192,079.35 = 115,368.30/x
  3. Step 3: Cross multiply
    128,052.90x = 192,079.35 × 115,368.30
  4. Step 4: Simplify right side
    128,052.90x = 22,159,868,074.61
  5. Step 5: Solve for x
    x = 22,159,868,074.61/128,052.90
  6. Step 6: Final answer
    x = 173,052.45

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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.