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Finding the Fourth Proportional to 147,643.80, 221,436.90 and 47,779.80

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Solution

The fourth proportional to 147,643.80, 221,436.90 and 47,779.80 is: 71,660.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,643.80 : 221,436.90 = 47,779.80 : x
  2. Step 2: Convert to fraction form
    147,643.80/221,436.90 = 47,779.80/x
  3. Step 3: Cross multiply
    147,643.80x = 221,436.90 × 47,779.80
  4. Step 4: Simplify right side
    147,643.80x = 10,580,210,794.62
  5. Step 5: Solve for x
    x = 10,580,210,794.62/147,643.80
  6. Step 6: Final answer
    x = 71,660.38

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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.