Home / 147,603.40-221,405.10-139,438.60

Finding the Fourth Proportional to 147,603.40, 221,405.10 and 139,438.60

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Solution

The fourth proportional to 147,603.40, 221,405.10 and 139,438.60 is: 209,157.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,603.40 : 221,405.10 = 139,438.60 : x
  2. Step 2: Convert to fraction form
    147,603.40/221,405.10 = 139,438.60/x
  3. Step 3: Cross multiply
    147,603.40x = 221,405.10 × 139,438.60
  4. Step 4: Simplify right side
    147,603.40x = 30,872,417,176.86
  5. Step 5: Solve for x
    x = 30,872,417,176.86/147,603.40
  6. Step 6: Final answer
    x = 209,157.90

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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.