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Finding the Fourth Proportional to 78,681.53, 117,958.21 and 36,588.20

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Solution

The fourth proportional to 78,681.53, 117,958.21 and 36,588.20 is: 54,852.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,681.53 : 117,958.21 = 36,588.20 : x
  2. Step 2: Convert to fraction form
    78,681.53/117,958.21 = 36,588.20/x
  3. Step 3: Cross multiply
    78,681.53x = 117,958.21 × 36,588.20
  4. Step 4: Simplify right side
    78,681.53x = 4,315,877,897.86
  5. Step 5: Solve for x
    x = 4,315,877,897.86/78,681.53
  6. Step 6: Final answer
    x = 54,852.49

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1.5x scale

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.