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Finding the Fourth Proportional to 139,968,109.80, 209,952,164.70 and 37,728,484.20

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Solution

The fourth proportional to 139,968,109.80, 209,952,164.70 and 37,728,484.20 is: 56,592,726.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,109.80 : 209,952,164.70 = 37,728,484.20 : x
  2. Step 2: Convert to fraction form
    139,968,109.80/209,952,164.70 = 37,728,484.20/x
  3. Step 3: Cross multiply
    139,968,109.80x = 209,952,164.70 × 37,728,484.20
  4. Step 4: Simplify right side
    139,968,109.80x = 7,921,176,928,639,748
  5. Step 5: Solve for x
    x = 7,921,176,928,639,748/139,968,109.80
  6. Step 6: Final answer
    x = 56,592,726.30

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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.