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Finding the Fourth Proportional to 71,611.80, 107,417.70 and 42,014.40

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Solution

The fourth proportional to 71,611.80, 107,417.70 and 42,014.40 is: 63,021.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,611.80 : 107,417.70 = 42,014.40 : x
  2. Step 2: Convert to fraction form
    71,611.80/107,417.70 = 42,014.40/x
  3. Step 3: Cross multiply
    71,611.80x = 107,417.70 × 42,014.40
  4. Step 4: Simplify right side
    71,611.80x = 4,513,090,214.88
  5. Step 5: Solve for x
    x = 4,513,090,214.88/71,611.80
  6. Step 6: Final answer
    x = 63,021.60

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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.