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Finding the Fourth Proportional to 218,068.95, 327,070.59 and 139,730.61

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Solution

The fourth proportional to 218,068.95, 327,070.59 and 139,730.61 is: 209,574.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,068.95 : 327,070.59 = 139,730.61 : x
  2. Step 2: Convert to fraction form
    218,068.95/327,070.59 = 139,730.61/x
  3. Step 3: Cross multiply
    218,068.95x = 327,070.59 × 139,730.61
  4. Step 4: Simplify right side
    218,068.95x = 45,701,773,053.76
  5. Step 5: Solve for x
    x = 45,701,773,053.76/218,068.95
  6. Step 6: Final answer
    x = 209,574.88

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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.