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Finding the Third Proportional to 58,689,290 and 128,715,988

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Solution

The third proportional to 58,689,290 and 128,715,988 is: 282,296,915.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,689,290 : 128,715,988 = 128,715,988 : x
  2. Step 2: Convert to fraction form
    58,689,290/128,715,988 = 128,715,988/x
  3. Step 3: Cross multiply
    58,689,290x = 128,715,988 × 128,715,988
  4. Step 4: Simplify right side
    58,689,290x = 16,567,805,566,816,144
  5. Step 5: Solve for x
    x = 16,567,805,566,816,144/58,689,290
  6. Step 6: Final answer
    x = 282,296,915.96

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.