Home / 142,017.12-212,989.12-42,153.68

Finding the Fourth Proportional to 142,017.12, 212,989.12 and 42,153.68

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Solution

The fourth proportional to 142,017.12, 212,989.12 and 42,153.68 is: 63,219.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,017.12 : 212,989.12 = 42,153.68 : x
  2. Step 2: Convert to fraction form
    142,017.12/212,989.12 = 42,153.68/x
  3. Step 3: Cross multiply
    142,017.12x = 212,989.12 × 42,153.68
  4. Step 4: Simplify right side
    142,017.12x = 8,978,275,207.96
  5. Step 5: Solve for x
    x = 8,978,275,207.96/142,017.12
  6. Step 6: Final answer
    x = 63,219.67

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1.5x scale

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.