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Finding the Fourth Proportional to 118,637.64, 163,591.79 and 90,009.81

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Solution

The fourth proportional to 118,637.64, 163,591.79 and 90,009.81 is: 124,116.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,637.64 : 163,591.79 = 90,009.81 : x
  2. Step 2: Convert to fraction form
    118,637.64/163,591.79 = 90,009.81/x
  3. Step 3: Cross multiply
    118,637.64x = 163,591.79 × 90,009.81
  4. Step 4: Simplify right side
    118,637.64x = 14,724,865,485.41
  5. Step 5: Solve for x
    x = 14,724,865,485.41/118,637.64
  6. Step 6: Final answer
    x = 124,116.30

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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.