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Finding the Fourth Proportional to 101,292.60, 139,783.66 and 56,580.60

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Solution

The fourth proportional to 101,292.60, 139,783.66 and 56,580.60 is: 78,081.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,292.60 : 139,783.66 = 56,580.60 : x
  2. Step 2: Convert to fraction form
    101,292.60/139,783.66 = 56,580.60/x
  3. Step 3: Cross multiply
    101,292.60x = 139,783.66 × 56,580.60
  4. Step 4: Simplify right side
    101,292.60x = 7,909,043,353.00
  5. Step 5: Solve for x
    x = 7,909,043,353.00/101,292.60
  6. Step 6: Final answer
    x = 78,081.16

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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.