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Finding the Third Proportional to 19,387,528 and 40,780,688

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Solution

The third proportional to 19,387,528 and 40,780,688 is: 85,780,121.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,387,528 : 40,780,688 = 40,780,688 : x
  2. Step 2: Convert to fraction form
    19,387,528/40,780,688 = 40,780,688/x
  3. Step 3: Cross multiply
    19,387,528x = 40,780,688 × 40,780,688
  4. Step 4: Simplify right side
    19,387,528x = 1,663,064,513,753,344
  5. Step 5: Solve for x
    x = 1,663,064,513,753,344/19,387,528
  6. Step 6: Final answer
    x = 85,780,121.83

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.