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Finding the Fourth Proportional to 101,420.64, 139,968.96 and 67,368.96

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Solution

The fourth proportional to 101,420.64, 139,968.96 and 67,368.96 is: 92,974.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,420.64 : 139,968.96 = 67,368.96 : x
  2. Step 2: Convert to fraction form
    101,420.64/139,968.96 = 67,368.96/x
  3. Step 3: Cross multiply
    101,420.64x = 139,968.96 × 67,368.96
  4. Step 4: Simplify right side
    101,420.64x = 9,429,563,267.48
  5. Step 5: Solve for x
    x = 9,429,563,267.48/101,420.64
  6. Step 6: Final answer
    x = 92,974.80

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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.