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Finding the Fourth Proportional to 128,570.42, 192,868.31 and 44,319.49

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Solution

The fourth proportional to 128,570.42, 192,868.31 and 44,319.49 is: 66,483.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,570.42 : 192,868.31 = 44,319.49 : x
  2. Step 2: Convert to fraction form
    128,570.42/192,868.31 = 44,319.49/x
  3. Step 3: Cross multiply
    128,570.42x = 192,868.31 × 44,319.49
  4. Step 4: Simplify right side
    128,570.42x = 8,547,824,812.59
  5. Step 5: Solve for x
    x = 8,547,824,812.59/128,570.42
  6. Step 6: Final answer
    x = 66,483.60

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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.