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Finding the Fourth Proportional to 105,368.58, 145,408.55 and 57,621.92

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Solution

The fourth proportional to 105,368.58, 145,408.55 and 57,621.92 is: 79,518.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,368.58 : 145,408.55 = 57,621.92 : x
  2. Step 2: Convert to fraction form
    105,368.58/145,408.55 = 57,621.92/x
  3. Step 3: Cross multiply
    105,368.58x = 145,408.55 × 57,621.92
  4. Step 4: Simplify right side
    105,368.58x = 8,378,718,820.26
  5. Step 5: Solve for x
    x = 8,378,718,820.26/105,368.58
  6. Step 6: Final answer
    x = 79,518.19

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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.