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Finding the Fourth Proportional to 155,967.84, 215,235 and 84,347.94

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Solution

The fourth proportional to 155,967.84, 215,235 and 84,347.94 is: 116,399.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,967.84 : 215,235 = 84,347.94 : x
  2. Step 2: Convert to fraction form
    155,967.84/215,235 = 84,347.94/x
  3. Step 3: Cross multiply
    155,967.84x = 215,235 × 84,347.94
  4. Step 4: Simplify right side
    155,967.84x = 18,154,628,865.90
  5. Step 5: Solve for x
    x = 18,154,628,865.90/155,967.84
  6. Step 6: Final answer
    x = 116,399.82

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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.