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Finding the Fourth Proportional to 118,603.14, 178,009.95 and 55,457.61

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Solution

The fourth proportional to 118,603.14, 178,009.95 and 55,457.61 is: 83,235.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,603.14 : 178,009.95 = 55,457.61 : x
  2. Step 2: Convert to fraction form
    118,603.14/178,009.95 = 55,457.61/x
  3. Step 3: Cross multiply
    118,603.14x = 178,009.95 × 55,457.61
  4. Step 4: Simplify right side
    118,603.14x = 9,872,006,924.95
  5. Step 5: Solve for x
    x = 9,872,006,924.95/118,603.14
  6. Step 6: Final answer
    x = 83,235.63

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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.