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Finding the Fourth Proportional to 100,368.76, 138,161.24 and 86,750.60

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Solution

The fourth proportional to 100,368.76, 138,161.24 and 86,750.60 is: 119,415.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,368.76 : 138,161.24 = 86,750.60 : x
  2. Step 2: Convert to fraction form
    100,368.76/138,161.24 = 86,750.60/x
  3. Step 3: Cross multiply
    100,368.76x = 138,161.24 × 86,750.60
  4. Step 4: Simplify right side
    100,368.76x = 11,985,570,466.74
  5. Step 5: Solve for x
    x = 11,985,570,466.74/100,368.76
  6. Step 6: Final answer
    x = 119,415.35

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1.5x scale

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.