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Finding the Fourth Proportional to 110,672.70, 166,009.05 and 77,430.30

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Solution

The fourth proportional to 110,672.70, 166,009.05 and 77,430.30 is: 116,145.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,672.70 : 166,009.05 = 77,430.30 : x
  2. Step 2: Convert to fraction form
    110,672.70/166,009.05 = 77,430.30/x
  3. Step 3: Cross multiply
    110,672.70x = 166,009.05 × 77,430.30
  4. Step 4: Simplify right side
    110,672.70x = 12,854,130,544.22
  5. Step 5: Solve for x
    x = 12,854,130,544.22/110,672.70
  6. Step 6: Final answer
    x = 116,145.45

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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.