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Finding the Fourth Proportional to 112,700, 155,530.86 and 62,399

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Solution

The fourth proportional to 112,700, 155,530.86 and 62,399 is: 86,113.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,700 : 155,530.86 = 62,399 : x
  2. Step 2: Convert to fraction form
    112,700/155,530.86 = 62,399/x
  3. Step 3: Cross multiply
    112,700x = 155,530.86 × 62,399
  4. Step 4: Simplify right side
    112,700x = 9,704,970,133.14
  5. Step 5: Solve for x
    x = 9,704,970,133.14/112,700
  6. Step 6: Final answer
    x = 86,113.31

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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.