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Finding the Fourth Proportional to 128,570.62, 192,868.62 and 44,319.69

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Solution

The fourth proportional to 128,570.62, 192,868.62 and 44,319.69 is: 66,483.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,570.62 : 192,868.62 = 44,319.69 : x
  2. Step 2: Convert to fraction form
    128,570.62/192,868.62 = 44,319.69/x
  3. Step 3: Cross multiply
    128,570.62x = 192,868.62 × 44,319.69
  4. Step 4: Simplify right side
    128,570.62x = 8,547,877,810.76
  5. Step 5: Solve for x
    x = 8,547,877,810.76/128,570.62
  6. Step 6: Final answer
    x = 66,483.91

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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.