Home / 139,968,690.70-209,953,036.05-120,821,068.30

Finding the Fourth Proportional to 139,968,690.70, 209,953,036.05 and 120,821,068.30

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Solution

The fourth proportional to 139,968,690.70, 209,953,036.05 and 120,821,068.30 is: 181,231,602.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,690.70 : 209,953,036.05 = 120,821,068.30 : x
  2. Step 2: Convert to fraction form
    139,968,690.70/209,953,036.05 = 120,821,068.30/x
  3. Step 3: Cross multiply
    139,968,690.70x = 209,953,036.05 × 120,821,068.30
  4. Step 4: Simplify right side
    139,968,690.70x = 25,366,750,108,389,412
  5. Step 5: Solve for x
    x = 25,366,750,108,389,412/139,968,690.70
  6. Step 6: Final answer
    x = 181,231,602.45

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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.