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Finding the Fourth Proportional to 105,368.77, 145,410.05 and 57,621.09

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Solution

The fourth proportional to 105,368.77, 145,410.05 and 57,621.09 is: 79,517.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,368.77 : 145,410.05 = 57,621.09 : x
  2. Step 2: Convert to fraction form
    105,368.77/145,410.05 = 57,621.09/x
  3. Step 3: Cross multiply
    105,368.77x = 145,410.05 × 57,621.09
  4. Step 4: Simplify right side
    105,368.77x = 8,378,686,267.29
  5. Step 5: Solve for x
    x = 8,378,686,267.29/105,368.77
  6. Step 6: Final answer
    x = 79,517.74

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1.5x scale

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.