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Finding the Fourth Proportional to 209,952,421.80, 314,928,632.70 and 73,637,805.30

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Solution

The fourth proportional to 209,952,421.80, 314,928,632.70 and 73,637,805.30 is: 110,456,707.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,952,421.80 : 314,928,632.70 = 73,637,805.30 : x
  2. Step 2: Convert to fraction form
    209,952,421.80/314,928,632.70 = 73,637,805.30/x
  3. Step 3: Cross multiply
    209,952,421.80x = 314,928,632.70 × 73,637,805.30
  4. Step 4: Simplify right side
    209,952,421.80x = 23,190,653,338,157,812
  5. Step 5: Solve for x
    x = 23,190,653,338,157,812/209,952,421.80
  6. Step 6: Final answer
    x = 110,456,707.95

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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.