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Finding the Fourth Proportional to 90,683.88, 136,048.86 and 53,275.58

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Solution

The fourth proportional to 90,683.88, 136,048.86 and 53,275.58 is: 79,926.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,683.88 : 136,048.86 = 53,275.58 : x
  2. Step 2: Convert to fraction form
    90,683.88/136,048.86 = 53,275.58/x
  3. Step 3: Cross multiply
    90,683.88x = 136,048.86 × 53,275.58
  4. Step 4: Simplify right side
    90,683.88x = 7,248,081,924.84
  5. Step 5: Solve for x
    x = 7,248,081,924.84/90,683.88
  6. Step 6: Final answer
    x = 79,926.91

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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.