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Finding the Fourth Proportional to 79,120.40, 118,681.80 and 25,812.14

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Solution

The fourth proportional to 79,120.40, 118,681.80 and 25,812.14 is: 38,718.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,120.40 : 118,681.80 = 25,812.14 : x
  2. Step 2: Convert to fraction form
    79,120.40/118,681.80 = 25,812.14/x
  3. Step 3: Cross multiply
    79,120.40x = 118,681.80 × 25,812.14
  4. Step 4: Simplify right side
    79,120.40x = 3,063,431,237.05
  5. Step 5: Solve for x
    x = 3,063,431,237.05/79,120.40
  6. Step 6: Final answer
    x = 38,718.60

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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.