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Finding the Third Proportional to 30,390.19 and 66,430.13

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Solution

The third proportional to 30,390.19 and 66,430.13 is: 145,210.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,390.19 : 66,430.13 = 66,430.13 : x
  2. Step 2: Convert to fraction form
    30,390.19/66,430.13 = 66,430.13/x
  3. Step 3: Cross multiply
    30,390.19x = 66,430.13 × 66,430.13
  4. Step 4: Simplify right side
    30,390.19x = 4,412,961,507.52
  5. Step 5: Solve for x
    x = 4,412,961,507.52/30,390.19
  6. Step 6: Final answer
    x = 145,210.08

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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.