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Finding the Fourth Proportional to 123,095.16, 169,871.40 and 66,506.58

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Solution

The fourth proportional to 123,095.16, 169,871.40 and 66,506.58 is: 91,779.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,095.16 : 169,871.40 = 66,506.58 : x
  2. Step 2: Convert to fraction form
    123,095.16/169,871.40 = 66,506.58/x
  3. Step 3: Cross multiply
    123,095.16x = 169,871.40 × 66,506.58
  4. Step 4: Simplify right side
    123,095.16x = 11,297,565,853.81
  5. Step 5: Solve for x
    x = 11,297,565,853.81/123,095.16
  6. Step 6: Final answer
    x = 91,779.12

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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.