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Finding the Fourth Proportional to 101,392.80, 139,916.40 and 56,068.04

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Solution

The fourth proportional to 101,392.80, 139,916.40 and 56,068.04 is: 77,370.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,392.80 : 139,916.40 = 56,068.04 : x
  2. Step 2: Convert to fraction form
    101,392.80/139,916.40 = 56,068.04/x
  3. Step 3: Cross multiply
    101,392.80x = 139,916.40 × 56,068.04
  4. Step 4: Simplify right side
    101,392.80x = 7,844,838,311.86
  5. Step 5: Solve for x
    x = 7,844,838,311.86/101,392.80
  6. Step 6: Final answer
    x = 77,370.76

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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.