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Finding the Fourth Proportional to 101,160, 139,600.80 and 56,448.32

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Solution

The fourth proportional to 101,160, 139,600.80 and 56,448.32 is: 77,898.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,160 : 139,600.80 = 56,448.32 : x
  2. Step 2: Convert to fraction form
    101,160/139,600.80 = 56,448.32/x
  3. Step 3: Cross multiply
    101,160x = 139,600.80 × 56,448.32
  4. Step 4: Simplify right side
    101,160x = 7,880,230,630.66
  5. Step 5: Solve for x
    x = 7,880,230,630.66/101,160
  6. Step 6: Final answer
    x = 77,898.68

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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.