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Finding the Fourth Proportional to 112,305.36, 154,978.98 and 61,316.12

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Solution

The fourth proportional to 112,305.36, 154,978.98 and 61,316.12 is: 84,614.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,305.36 : 154,978.98 = 61,316.12 : x
  2. Step 2: Convert to fraction form
    112,305.36/154,978.98 = 61,316.12/x
  3. Step 3: Cross multiply
    112,305.36x = 154,978.98 × 61,316.12
  4. Step 4: Simplify right side
    112,305.36x = 9,502,709,735.16
  5. Step 5: Solve for x
    x = 9,502,709,735.16/112,305.36
  6. Step 6: Final answer
    x = 84,614.93

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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.