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Finding the Fourth Proportional to 101,355.52, 139,870.58 and 55,415.32

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Solution

The fourth proportional to 101,355.52, 139,870.58 and 55,415.32 is: 76,473.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,355.52 : 139,870.58 = 55,415.32 : x
  2. Step 2: Convert to fraction form
    101,355.52/139,870.58 = 55,415.32/x
  3. Step 3: Cross multiply
    101,355.52x = 139,870.58 × 55,415.32
  4. Step 4: Simplify right side
    101,355.52x = 7,750,972,949.29
  5. Step 5: Solve for x
    x = 7,750,972,949.29/101,355.52
  6. Step 6: Final answer
    x = 76,473.12

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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.