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Finding the Fourth Proportional to 100,967.04, 139,335.12 and 56,255.04

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Solution

The fourth proportional to 100,967.04, 139,335.12 and 56,255.04 is: 77,632.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,967.04 : 139,335.12 = 56,255.04 : x
  2. Step 2: Convert to fraction form
    100,967.04/139,335.12 = 56,255.04/x
  3. Step 3: Cross multiply
    100,967.04x = 139,335.12 × 56,255.04
  4. Step 4: Simplify right side
    100,967.04x = 7,838,302,749.00
  5. Step 5: Solve for x
    x = 7,838,302,749.00/100,967.04
  6. Step 6: Final answer
    x = 77,632.29

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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.