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Finding the Fourth Proportional to 73,686.40, 110,526.90 and 21,095.80

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Solution

The fourth proportional to 73,686.40, 110,526.90 and 21,095.80 is: 31,642.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,686.40 : 110,526.90 = 21,095.80 : x
  2. Step 2: Convert to fraction form
    73,686.40/110,526.90 = 21,095.80/x
  3. Step 3: Cross multiply
    73,686.40x = 110,526.90 × 21,095.80
  4. Step 4: Simplify right side
    73,686.40x = 2,331,653,377.02
  5. Step 5: Solve for x
    x = 2,331,653,377.02/73,686.40
  6. Step 6: Final answer
    x = 31,642.93

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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.