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Finding the Fourth Proportional to 139,968,165.70, 209,952,248.55 and 139,117,860.10

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Solution

The fourth proportional to 139,968,165.70, 209,952,248.55 and 139,117,860.10 is: 208,676,790.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,165.70 : 209,952,248.55 = 139,117,860.10 : x
  2. Step 2: Convert to fraction form
    139,968,165.70/209,952,248.55 = 139,117,860.10/x
  3. Step 3: Cross multiply
    139,968,165.70x = 209,952,248.55 × 139,117,860.10
  4. Step 4: Simplify right side
    139,968,165.70x = 29,208,107,541,459,328
  5. Step 5: Solve for x
    x = 29,208,107,541,459,328/139,968,165.70
  6. Step 6: Final answer
    x = 208,676,790.15

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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.