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Finding the Fourth Proportional to 139,969,205.20, 209,953,807.80 and 63,441,701.20

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Solution

The fourth proportional to 139,969,205.20, 209,953,807.80 and 63,441,701.20 is: 95,162,551.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,205.20 : 209,953,807.80 = 63,441,701.20 : x
  2. Step 2: Convert to fraction form
    139,969,205.20/209,953,807.80 = 63,441,701.20/x
  3. Step 3: Cross multiply
    139,969,205.20x = 209,953,807.80 × 63,441,701.20
  4. Step 4: Simplify right side
    139,969,205.20x = 13,319,826,740,249,830
  5. Step 5: Solve for x
    x = 13,319,826,740,249,830/139,969,205.20
  6. Step 6: Final answer
    x = 95,162,551.80

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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.