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Finding the Fourth Proportional to 105,321.36, 145,329.44 and 67,646.64

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Solution

The fourth proportional to 105,321.36, 145,329.44 and 67,646.64 is: 93,343.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,321.36 : 145,329.44 = 67,646.64 : x
  2. Step 2: Convert to fraction form
    105,321.36/145,329.44 = 67,646.64/x
  3. Step 3: Cross multiply
    105,321.36x = 145,329.44 × 67,646.64
  4. Step 4: Simplify right side
    105,321.36x = 9,831,048,309.08
  5. Step 5: Solve for x
    x = 9,831,048,309.08/105,321.36
  6. Step 6: Final answer
    x = 93,343.35

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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.