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Finding the Fourth Proportional to 117,761.78, 162,507.78 and 66,779.16

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Solution

The fourth proportional to 117,761.78, 162,507.78 and 66,779.16 is: 92,153.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,761.78 : 162,507.78 = 66,779.16 : x
  2. Step 2: Convert to fraction form
    117,761.78/162,507.78 = 66,779.16/x
  3. Step 3: Cross multiply
    117,761.78x = 162,507.78 × 66,779.16
  4. Step 4: Simplify right side
    117,761.78x = 10,852,133,041.86
  5. Step 5: Solve for x
    x = 10,852,133,041.86/117,761.78
  6. Step 6: Final answer
    x = 92,153.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.