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Finding the Fourth Proportional to 100,875.94, 139,203.76 and 55,557.84

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Solution

The fourth proportional to 100,875.94, 139,203.76 and 55,557.84 is: 76,667.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,875.94 : 139,203.76 = 55,557.84 : x
  2. Step 2: Convert to fraction form
    100,875.94/139,203.76 = 55,557.84/x
  3. Step 3: Cross multiply
    100,875.94x = 139,203.76 × 55,557.84
  4. Step 4: Simplify right side
    100,875.94x = 7,733,860,225.48
  5. Step 5: Solve for x
    x = 7,733,860,225.48/100,875.94
  6. Step 6: Final answer
    x = 76,667.04

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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.