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Finding the Fourth Proportional to 101,316, 139,816.08 and 56,612.64

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Solution

The fourth proportional to 101,316, 139,816.08 and 56,612.64 is: 78,125.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,316 : 139,816.08 = 56,612.64 : x
  2. Step 2: Convert to fraction form
    101,316/139,816.08 = 56,612.64/x
  3. Step 3: Cross multiply
    101,316x = 139,816.08 × 56,612.64
  4. Step 4: Simplify right side
    101,316x = 7,915,357,403.25
  5. Step 5: Solve for x
    x = 7,915,357,403.25/101,316
  6. Step 6: Final answer
    x = 78,125.44

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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.