Home / 139,968,693.10-209,953,039.65-78,746,689.90

Finding the Fourth Proportional to 139,968,693.10, 209,953,039.65 and 78,746,689.90

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Solution

The fourth proportional to 139,968,693.10, 209,953,039.65 and 78,746,689.90 is: 118,120,034.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,693.10 : 209,953,039.65 = 78,746,689.90 : x
  2. Step 2: Convert to fraction form
    139,968,693.10/209,953,039.65 = 78,746,689.90/x
  3. Step 3: Cross multiply
    139,968,693.10x = 209,953,039.65 × 78,746,689.90
  4. Step 4: Simplify right side
    139,968,693.10x = 16,533,106,906,880,956
  5. Step 5: Solve for x
    x = 16,533,106,906,880,956/139,968,693.10
  6. Step 6: Final answer
    x = 118,120,034.85

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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.