Home / 78,051.46-117,077.86-18,887.18

Finding the Fourth Proportional to 78,051.46, 117,077.86 and 18,887.18

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Solution

The fourth proportional to 78,051.46, 117,077.86 and 18,887.18 is: 28,330.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,051.46 : 117,077.86 = 18,887.18 : x
  2. Step 2: Convert to fraction form
    78,051.46/117,077.86 = 18,887.18/x
  3. Step 3: Cross multiply
    78,051.46x = 117,077.86 × 18,887.18
  4. Step 4: Simplify right side
    78,051.46x = 2,211,270,615.83
  5. Step 5: Solve for x
    x = 2,211,270,615.83/78,051.46
  6. Step 6: Final answer
    x = 28,330.93

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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.