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Finding the Fourth Proportional to 139,968,009.30, 209,952,013.95 and 105,955,785.30

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Solution

The fourth proportional to 139,968,009.30, 209,952,013.95 and 105,955,785.30 is: 158,933,677.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,009.30 : 209,952,013.95 = 105,955,785.30 : x
  2. Step 2: Convert to fraction form
    139,968,009.30/209,952,013.95 = 105,955,785.30/x
  3. Step 3: Cross multiply
    139,968,009.30x = 209,952,013.95 × 105,955,785.30
  4. Step 4: Simplify right side
    139,968,009.30x = 22,245,630,513,388,804
  5. Step 5: Solve for x
    x = 22,245,630,513,388,804/139,968,009.30
  6. Step 6: Final answer
    x = 158,933,677.95

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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.