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Finding the Fourth Proportional to 105,647, 145,766.76 and 62,636.58

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Solution

The fourth proportional to 105,647, 145,766.76 and 62,636.58 is: 86,423.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,647 : 145,766.76 = 62,636.58 : x
  2. Step 2: Convert to fraction form
    105,647/145,766.76 = 62,636.58/x
  3. Step 3: Cross multiply
    105,647x = 145,766.76 × 62,636.58
  4. Step 4: Simplify right side
    105,647x = 9,130,331,324.08
  5. Step 5: Solve for x
    x = 9,130,331,324.08/105,647
  6. Step 6: Final answer
    x = 86,423.01

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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.