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Finding the Third Proportional to 156,931,553 and 215,424,178

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Solution

The third proportional to 156,931,553 and 215,424,178 is: 295,718,582.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,931,553 : 215,424,178 = 215,424,178 : x
  2. Step 2: Convert to fraction form
    156,931,553/215,424,178 = 215,424,178/x
  3. Step 3: Cross multiply
    156,931,553x = 215,424,178 × 215,424,178
  4. Step 4: Simplify right side
    156,931,553x = 46,407,576,466,975,680
  5. Step 5: Solve for x
    x = 46,407,576,466,975,680/156,931,553
  6. Step 6: Final answer
    x = 295,718,582.91

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.