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Finding the Fourth Proportional to 75,271.51, 112,926.25 and 53,128.13

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Solution

The fourth proportional to 75,271.51, 112,926.25 and 53,128.13 is: 79,705.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,271.51 : 112,926.25 = 53,128.13 : x
  2. Step 2: Convert to fraction form
    75,271.51/112,926.25 = 53,128.13/x
  3. Step 3: Cross multiply
    75,271.51x = 112,926.25 × 53,128.13
  4. Step 4: Simplify right side
    75,271.51x = 5,999,560,639.91
  5. Step 5: Solve for x
    x = 5,999,560,639.91/75,271.51
  6. Step 6: Final answer
    x = 79,705.60

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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.