Home / 72,539,105.20-108,808,657.80-68,382,055.60

Finding the Fourth Proportional to 72,539,105.20, 108,808,657.80 and 68,382,055.60

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Solution

The fourth proportional to 72,539,105.20, 108,808,657.80 and 68,382,055.60 is: 102,573,083.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,539,105.20 : 108,808,657.80 = 68,382,055.60 : x
  2. Step 2: Convert to fraction form
    72,539,105.20/108,808,657.80 = 68,382,055.60/x
  3. Step 3: Cross multiply
    72,539,105.20x = 108,808,657.80 × 68,382,055.60
  4. Step 4: Simplify right side
    72,539,105.20x = 7,440,559,687,440,973
  5. Step 5: Solve for x
    x = 7,440,559,687,440,973/72,539,105.20
  6. Step 6: Final answer
    x = 102,573,083.40

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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.