Home / 78,105.51-117,157.23-18,941.76

Finding the Fourth Proportional to 78,105.51, 117,157.23 and 18,941.76

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Solution

The fourth proportional to 78,105.51, 117,157.23 and 18,941.76 is: 28,412.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,105.51 : 117,157.23 = 18,941.76 : x
  2. Step 2: Convert to fraction form
    78,105.51/117,157.23 = 18,941.76/x
  3. Step 3: Cross multiply
    78,105.51x = 117,157.23 × 18,941.76
  4. Step 4: Simplify right side
    78,105.51x = 2,219,164,132.92
  5. Step 5: Solve for x
    x = 2,219,164,132.92/78,105.51
  6. Step 6: Final answer
    x = 28,412.39

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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.