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Finding the Fourth Proportional to 118,287.79, 163,415.22 and 77,548.71

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Solution

The fourth proportional to 118,287.79, 163,415.22 and 77,548.71 is: 107,133.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,287.79 : 163,415.22 = 77,548.71 : x
  2. Step 2: Convert to fraction form
    118,287.79/163,415.22 = 77,548.71/x
  3. Step 3: Cross multiply
    118,287.79x = 163,415.22 × 77,548.71
  4. Step 4: Simplify right side
    118,287.79x = 12,672,639,505.37
  5. Step 5: Solve for x
    x = 12,672,639,505.37/118,287.79
  6. Step 6: Final answer
    x = 107,133.96

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1.5x scale

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.