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Finding the Fourth Proportional to 101,124.19, 139,551.79 and 55,803.50

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Solution

The fourth proportional to 101,124.19, 139,551.79 and 55,803.50 is: 77,009.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,124.19 : 139,551.79 = 55,803.50 : x
  2. Step 2: Convert to fraction form
    101,124.19/139,551.79 = 55,803.50/x
  3. Step 3: Cross multiply
    101,124.19x = 139,551.79 × 55,803.50
  4. Step 4: Simplify right side
    101,124.19x = 7,787,477,615.51
  5. Step 5: Solve for x
    x = 7,787,477,615.51/101,124.19
  6. Step 6: Final answer
    x = 77,009.05

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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.