Home / 139,968,690.90-209,953,036.35-78,746,687.70

Finding the Fourth Proportional to 139,968,690.90, 209,953,036.35 and 78,746,687.70

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Solution

The fourth proportional to 139,968,690.90, 209,953,036.35 and 78,746,687.70 is: 118,120,031.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,690.90 : 209,953,036.35 = 78,746,687.70 : x
  2. Step 2: Convert to fraction form
    139,968,690.90/209,953,036.35 = 78,746,687.70/x
  3. Step 3: Cross multiply
    139,968,690.90x = 209,953,036.35 × 78,746,687.70
  4. Step 4: Simplify right side
    139,968,690.90x = 16,533,106,185,120,198
  5. Step 5: Solve for x
    x = 16,533,106,185,120,198/139,968,690.90
  6. Step 6: Final answer
    x = 118,120,031.55

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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.