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Finding the Fourth Proportional to 71,420.40, 107,009.10 and 46,422.18

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Solution

The fourth proportional to 71,420.40, 107,009.10 and 46,422.18 is: 69,554.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,420.40 : 107,009.10 = 46,422.18 : x
  2. Step 2: Convert to fraction form
    71,420.40/107,009.10 = 46,422.18/x
  3. Step 3: Cross multiply
    71,420.40x = 107,009.10 × 46,422.18
  4. Step 4: Simplify right side
    71,420.40x = 4,967,595,701.84
  5. Step 5: Solve for x
    x = 4,967,595,701.84/71,420.40
  6. Step 6: Final answer
    x = 69,554.30

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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.