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Finding the Fourth Proportional to 139,968,678.60, 209,953,017.90 and 49,080,457.80

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Solution

The fourth proportional to 139,968,678.60, 209,953,017.90 and 49,080,457.80 is: 73,620,686.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,678.60 : 209,953,017.90 = 49,080,457.80 : x
  2. Step 2: Convert to fraction form
    139,968,678.60/209,953,017.90 = 49,080,457.80/x
  3. Step 3: Cross multiply
    139,968,678.60x = 209,953,017.90 × 49,080,457.80
  4. Step 4: Simplify right side
    139,968,678.60x = 10,304,590,235,023,594
  5. Step 5: Solve for x
    x = 10,304,590,235,023,594/139,968,678.60
  6. Step 6: Final answer
    x = 73,620,686.70

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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.