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Finding the Fourth Proportional to 139,968,017.60, 209,952,026.40 and 49,079,796.80

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Solution

The fourth proportional to 139,968,017.60, 209,952,026.40 and 49,079,796.80 is: 73,619,695.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,017.60 : 209,952,026.40 = 49,079,796.80 : x
  2. Step 2: Convert to fraction form
    139,968,017.60/209,952,026.40 = 49,079,796.80/x
  3. Step 3: Cross multiply
    139,968,017.60x = 209,952,026.40 × 49,079,796.80
  4. Step 4: Simplify right side
    139,968,017.60x = 10,304,402,793,460,236
  5. Step 5: Solve for x
    x = 10,304,402,793,460,236/139,968,017.60
  6. Step 6: Final answer
    x = 73,619,695.20

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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.