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Finding the Fourth Proportional to 169,973,128.80, 254,959,693.20 and 67,810,485.60

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Solution

The fourth proportional to 169,973,128.80, 254,959,693.20 and 67,810,485.60 is: 101,715,728.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,973,128.80 : 254,959,693.20 = 67,810,485.60 : x
  2. Step 2: Convert to fraction form
    169,973,128.80/254,959,693.20 = 67,810,485.60/x
  3. Step 3: Cross multiply
    169,973,128.80x = 254,959,693.20 × 67,810,485.60
  4. Step 4: Simplify right side
    169,973,128.80x = 17,288,940,604,319,016
  5. Step 5: Solve for x
    x = 17,288,940,604,319,016/169,973,128.80
  6. Step 6: Final answer
    x = 101,715,728.40

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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.