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Finding the Fourth Proportional to 201,566.61, 278,068.86 and 129,969.63

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Solution

The fourth proportional to 201,566.61, 278,068.86 and 129,969.63 is: 179,298.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,566.61 : 278,068.86 = 129,969.63 : x
  2. Step 2: Convert to fraction form
    201,566.61/278,068.86 = 129,969.63/x
  3. Step 3: Cross multiply
    201,566.61x = 278,068.86 × 129,969.63
  4. Step 4: Simplify right side
    201,566.61x = 36,140,506,848.72
  5. Step 5: Solve for x
    x = 36,140,506,848.72/201,566.61
  6. Step 6: Final answer
    x = 179,298.08

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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.