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Finding the Third Proportional to 55,390,560 and 128,219,117

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Solution

The third proportional to 55,390,560 and 128,219,117 is: 296,804,039.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,390,560 : 128,219,117 = 128,219,117 : x
  2. Step 2: Convert to fraction form
    55,390,560/128,219,117 = 128,219,117/x
  3. Step 3: Cross multiply
    55,390,560x = 128,219,117 × 128,219,117
  4. Step 4: Simplify right side
    55,390,560x = 16,440,141,964,259,688
  5. Step 5: Solve for x
    x = 16,440,141,964,259,688/55,390,560
  6. Step 6: Final answer
    x = 296,804,039.61

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.