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Finding the Fourth Proportional to 70,019.39, 105,075.78 and 36,316.47

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Solution

The fourth proportional to 70,019.39, 105,075.78 and 36,316.47 is: 54,498.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,019.39 : 105,075.78 = 36,316.47 : x
  2. Step 2: Convert to fraction form
    70,019.39/105,075.78 = 36,316.47/x
  3. Step 3: Cross multiply
    70,019.39x = 105,075.78 × 36,316.47
  4. Step 4: Simplify right side
    70,019.39x = 3,815,981,283.17
  5. Step 5: Solve for x
    x = 3,815,981,283.17/70,019.39
  6. Step 6: Final answer
    x = 54,498.92

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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.