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Finding the Fourth Proportional to 208,303.65, 287,455.64 and 112,809.51

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Solution

The fourth proportional to 208,303.65, 287,455.64 and 112,809.51 is: 155,675.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,303.65 : 287,455.64 = 112,809.51 : x
  2. Step 2: Convert to fraction form
    208,303.65/287,455.64 = 112,809.51/x
  3. Step 3: Cross multiply
    208,303.65x = 287,455.64 × 112,809.51
  4. Step 4: Simplify right side
    208,303.65x = 32,427,729,331.09
  5. Step 5: Solve for x
    x = 32,427,729,331.09/208,303.65
  6. Step 6: Final answer
    x = 155,675.28

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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.