Home / 78,066.42-117,099.09-18,902.40

Finding the Fourth Proportional to 78,066.42, 117,099.09 and 18,902.40

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Solution

The fourth proportional to 78,066.42, 117,099.09 and 18,902.40 is: 28,353.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,066.42 : 117,099.09 = 18,902.40 : x
  2. Step 2: Convert to fraction form
    78,066.42/117,099.09 = 18,902.40/x
  3. Step 3: Cross multiply
    78,066.42x = 117,099.09 × 18,902.40
  4. Step 4: Simplify right side
    78,066.42x = 2,213,453,838.82
  5. Step 5: Solve for x
    x = 2,213,453,838.82/78,066.42
  6. Step 6: Final answer
    x = 28,353.47

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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.