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Finding the Fourth Proportional to 72,530.51, 100,064.57 and 53,455.82

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Solution

The fourth proportional to 72,530.51, 100,064.57 and 53,455.82 is: 73,748.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,530.51 : 100,064.57 = 53,455.82 : x
  2. Step 2: Convert to fraction form
    72,530.51/100,064.57 = 53,455.82/x
  3. Step 3: Cross multiply
    72,530.51x = 100,064.57 × 53,455.82
  4. Step 4: Simplify right side
    72,530.51x = 5,349,032,874.70
  5. Step 5: Solve for x
    x = 5,349,032,874.70/72,530.51
  6. Step 6: Final answer
    x = 73,748.73

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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.