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Finding the Fourth Proportional to 219,683.70, 329,525.55 and 129,870.90

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Solution

The fourth proportional to 219,683.70, 329,525.55 and 129,870.90 is: 194,806.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,683.70 : 329,525.55 = 129,870.90 : x
  2. Step 2: Convert to fraction form
    219,683.70/329,525.55 = 129,870.90/x
  3. Step 3: Cross multiply
    219,683.70x = 329,525.55 × 129,870.90
  4. Step 4: Simplify right side
    219,683.70x = 42,795,779,751.50
  5. Step 5: Solve for x
    x = 42,795,779,751.50/219,683.70
  6. Step 6: Final answer
    x = 194,806.35

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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.