Home / 74,453,890.80-111,771,815.40-42,128,281.20

Finding the Fourth Proportional to 74,453,890.80, 111,771,815.40 and 42,128,281.20

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Solution

The fourth proportional to 74,453,890.80, 111,771,815.40 and 42,128,281.20 is: 63,243,900.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,453,890.80 : 111,771,815.40 = 42,128,281.20 : x
  2. Step 2: Convert to fraction form
    74,453,890.80/111,771,815.40 = 42,128,281.20/x
  3. Step 3: Cross multiply
    74,453,890.80x = 111,771,815.40 × 42,128,281.20
  4. Step 4: Simplify right side
    74,453,890.80x = 4,708,754,469,405,691
  5. Step 5: Solve for x
    x = 4,708,754,469,405,691/74,453,890.80
  6. Step 6: Final answer
    x = 63,243,900.60

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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.