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Finding the Fourth Proportional to 145,811.13, 218,637.55 and 65,755.43

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Solution

The fourth proportional to 145,811.13, 218,637.55 and 65,755.43 is: 98,597.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,811.13 : 218,637.55 = 65,755.43 : x
  2. Step 2: Convert to fraction form
    145,811.13/218,637.55 = 65,755.43/x
  3. Step 3: Cross multiply
    145,811.13x = 218,637.55 × 65,755.43
  4. Step 4: Simplify right side
    145,811.13x = 14,376,605,581.16
  5. Step 5: Solve for x
    x = 14,376,605,581.16/145,811.13
  6. Step 6: Final answer
    x = 98,597.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.