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Finding the Fourth Proportional to 189,173.59, 261,051.43 and 103,130.47

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Solution

The fourth proportional to 189,173.59, 261,051.43 and 103,130.47 is: 142,315.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,173.59 : 261,051.43 = 103,130.47 : x
  2. Step 2: Convert to fraction form
    189,173.59/261,051.43 = 103,130.47/x
  3. Step 3: Cross multiply
    189,173.59x = 261,051.43 × 103,130.47
  4. Step 4: Simplify right side
    189,173.59x = 26,922,356,670.07
  5. Step 5: Solve for x
    x = 26,922,356,670.07/189,173.59
  6. Step 6: Final answer
    x = 142,315.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.