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Finding the Fourth Proportional to 101,358.63, 139,874.18 and 56,038.59

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Solution

The fourth proportional to 101,358.63, 139,874.18 and 56,038.59 is: 77,332.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,358.63 : 139,874.18 = 56,038.59 : x
  2. Step 2: Convert to fraction form
    101,358.63/139,874.18 = 56,038.59/x
  3. Step 3: Cross multiply
    101,358.63x = 139,874.18 × 56,038.59
  4. Step 4: Simplify right side
    101,358.63x = 7,838,351,544.41
  5. Step 5: Solve for x
    x = 7,838,351,544.41/101,358.63
  6. Step 6: Final answer
    x = 77,332.85

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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.