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Finding the Fourth Proportional to 145,640.79, 218,546.14 and 61,395.84

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Solution

The fourth proportional to 145,640.79, 218,546.14 and 61,395.84 is: 92,129.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,640.79 : 218,546.14 = 61,395.84 : x
  2. Step 2: Convert to fraction form
    145,640.79/218,546.14 = 61,395.84/x
  3. Step 3: Cross multiply
    145,640.79x = 218,546.14 × 61,395.84
  4. Step 4: Simplify right side
    145,640.79x = 13,417,822,444.35
  5. Step 5: Solve for x
    x = 13,417,822,444.35/145,640.79
  6. Step 6: Final answer
    x = 92,129.57

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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.