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Finding the Fourth Proportional to 70,871.12, 97,797.74 and 39,038.24

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Solution

The fourth proportional to 70,871.12, 97,797.74 and 39,038.24 is: 53,870.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,871.12 : 97,797.74 = 39,038.24 : x
  2. Step 2: Convert to fraction form
    70,871.12/97,797.74 = 39,038.24/x
  3. Step 3: Cross multiply
    70,871.12x = 97,797.74 × 39,038.24
  4. Step 4: Simplify right side
    70,871.12x = 3,817,851,645.58
  5. Step 5: Solve for x
    x = 3,817,851,645.58/70,871.12
  6. Step 6: Final answer
    x = 53,870.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.