Home / 139,969,017.40-209,953,526.10-78,747,014.20

Finding the Fourth Proportional to 139,969,017.40, 209,953,526.10 and 78,747,014.20

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Solution

The fourth proportional to 139,969,017.40, 209,953,526.10 and 78,747,014.20 is: 118,120,521.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,017.40 : 209,953,526.10 = 78,747,014.20 : x
  2. Step 2: Convert to fraction form
    139,969,017.40/209,953,526.10 = 78,747,014.20/x
  3. Step 3: Cross multiply
    139,969,017.40x = 209,953,526.10 × 78,747,014.20
  4. Step 4: Simplify right side
    139,969,017.40x = 16,533,213,301,136,770
  5. Step 5: Solve for x
    x = 16,533,213,301,136,770/139,969,017.40
  6. Step 6: Final answer
    x = 118,120,521.30

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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.