Home / 70,422.10-105,638.02-28,302.21

Finding the Fourth Proportional to 70,422.10, 105,638.02 and 28,302.21

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Solution

The fourth proportional to 70,422.10, 105,638.02 and 28,302.21 is: 42,455.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,422.10 : 105,638.02 = 28,302.21 : x
  2. Step 2: Convert to fraction form
    70,422.10/105,638.02 = 28,302.21/x
  3. Step 3: Cross multiply
    70,422.10x = 105,638.02 × 28,302.21
  4. Step 4: Simplify right side
    70,422.10x = 2,989,790,015.84
  5. Step 5: Solve for x
    x = 2,989,790,015.84/70,422.10
  6. Step 6: Final answer
    x = 42,455.28

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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.