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Finding the Fourth Proportional to 111,852.51, 154,352.12 and 64,071.87

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Solution

The fourth proportional to 111,852.51, 154,352.12 and 64,071.87 is: 88,416.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,852.51 : 154,352.12 = 64,071.87 : x
  2. Step 2: Convert to fraction form
    111,852.51/154,352.12 = 64,071.87/x
  3. Step 3: Cross multiply
    111,852.51x = 154,352.12 × 64,071.87
  4. Step 4: Simplify right side
    111,852.51x = 9,889,628,646.51
  5. Step 5: Solve for x
    x = 9,889,628,646.51/111,852.51
  6. Step 6: Final answer
    x = 88,416.69

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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.