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Finding the Fourth Proportional to 103,539.60, 142,850.30 and 84,386.47

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Solution

The fourth proportional to 103,539.60, 142,850.30 and 84,386.47 is: 116,425.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,539.60 : 142,850.30 = 84,386.47 : x
  2. Step 2: Convert to fraction form
    103,539.60/142,850.30 = 84,386.47/x
  3. Step 3: Cross multiply
    103,539.60x = 142,850.30 × 84,386.47
  4. Step 4: Simplify right side
    103,539.60x = 12,054,632,555.44
  5. Step 5: Solve for x
    x = 12,054,632,555.44/103,539.60
  6. Step 6: Final answer
    x = 116,425.33

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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.