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Finding the Fourth Proportional to 109,070.61, 163,574.29 and 42,495.90

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Solution

The fourth proportional to 109,070.61, 163,574.29 and 42,495.90 is: 63,731.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,070.61 : 163,574.29 = 42,495.90 : x
  2. Step 2: Convert to fraction form
    109,070.61/163,574.29 = 42,495.90/x
  3. Step 3: Cross multiply
    109,070.61x = 163,574.29 × 42,495.90
  4. Step 4: Simplify right side
    109,070.61x = 6,951,236,670.41
  5. Step 5: Solve for x
    x = 6,951,236,670.41/109,070.61
  6. Step 6: Final answer
    x = 63,731.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.