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Finding the Fourth Proportional to 139,968,009.68, 209,952,014.51 and 103,688,304.08

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Solution

The fourth proportional to 139,968,009.68, 209,952,014.51 and 103,688,304.08 is: 155,532,456.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,009.68 : 209,952,014.51 = 103,688,304.08 : x
  2. Step 2: Convert to fraction form
    139,968,009.68/209,952,014.51 = 103,688,304.08/x
  3. Step 3: Cross multiply
    139,968,009.68x = 209,952,014.51 × 103,688,304.08
  4. Step 4: Simplify right side
    139,968,009.68x = 21,769,568,322,721,452
  5. Step 5: Solve for x
    x = 21,769,568,322,721,452/139,968,009.68
  6. Step 6: Final answer
    x = 155,532,456.11

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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.