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Finding the Fourth Proportional to 72,695,297.80, 109,042,946.70 and 52,287,963.40

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Solution

The fourth proportional to 72,695,297.80, 109,042,946.70 and 52,287,963.40 is: 78,431,945.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,695,297.80 : 109,042,946.70 = 52,287,963.40 : x
  2. Step 2: Convert to fraction form
    72,695,297.80/109,042,946.70 = 52,287,963.40/x
  3. Step 3: Cross multiply
    72,695,297.80x = 109,042,946.70 × 52,287,963.40
  4. Step 4: Simplify right side
    72,695,297.80x = 5,701,633,606,077,751
  5. Step 5: Solve for x
    x = 5,701,633,606,077,751/72,695,297.80
  6. Step 6: Final answer
    x = 78,431,945.10

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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.