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Finding the Fourth Proportional to 208,674.68, 287,985.36 and 118,030.72

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Solution

The fourth proportional to 208,674.68, 287,985.36 and 118,030.72 is: 162,890.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,674.68 : 287,985.36 = 118,030.72 : x
  2. Step 2: Convert to fraction form
    208,674.68/287,985.36 = 118,030.72/x
  3. Step 3: Cross multiply
    208,674.68x = 287,985.36 × 118,030.72
  4. Step 4: Simplify right side
    208,674.68x = 33,991,119,390.26
  5. Step 5: Solve for x
    x = 33,991,119,390.26/208,674.68
  6. Step 6: Final answer
    x = 162,890.48

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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.