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Finding the Fourth Proportional to 70,990.81, 97,959.75 and 39,159.71

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Solution

The fourth proportional to 70,990.81, 97,959.75 and 39,159.71 is: 54,036.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,990.81 : 97,959.75 = 39,159.71 : x
  2. Step 2: Convert to fraction form
    70,990.81/97,959.75 = 39,159.71/x
  3. Step 3: Cross multiply
    70,990.81x = 97,959.75 × 39,159.71
  4. Step 4: Simplify right side
    70,990.81x = 3,836,075,352.65
  5. Step 5: Solve for x
    x = 3,836,075,352.65/70,990.81
  6. Step 6: Final answer
    x = 54,036.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.