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Finding the Fourth Proportional to 112,699.50, 155,530.17 and 62,398.50

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Solution

The fourth proportional to 112,699.50, 155,530.17 and 62,398.50 is: 86,112.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,699.50 : 155,530.17 = 62,398.50 : x
  2. Step 2: Convert to fraction form
    112,699.50/155,530.17 = 62,398.50/x
  3. Step 3: Cross multiply
    112,699.50x = 155,530.17 × 62,398.50
  4. Step 4: Simplify right side
    112,699.50x = 9,704,849,312.75
  5. Step 5: Solve for x
    x = 9,704,849,312.75/112,699.50
  6. Step 6: Final answer
    x = 86,112.62

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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.