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Finding the Fourth Proportional to 101,358.15, 139,878.18 and 67,307.91

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Solution

The fourth proportional to 101,358.15, 139,878.18 and 67,307.91 is: 92,887.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,358.15 : 139,878.18 = 67,307.91 : x
  2. Step 2: Convert to fraction form
    101,358.15/139,878.18 = 67,307.91/x
  3. Step 3: Cross multiply
    101,358.15x = 139,878.18 × 67,307.91
  4. Step 4: Simplify right side
    101,358.15x = 9,414,907,950.40
  5. Step 5: Solve for x
    x = 9,414,907,950.40/101,358.15
  6. Step 6: Final answer
    x = 92,887.53

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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.