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Finding the Fourth Proportional to 70,607.26, 105,925.47 and 20,688.98

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Solution

The fourth proportional to 70,607.26, 105,925.47 and 20,688.98 is: 31,037.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,607.26 : 105,925.47 = 20,688.98 : x
  2. Step 2: Convert to fraction form
    70,607.26/105,925.47 = 20,688.98/x
  3. Step 3: Cross multiply
    70,607.26x = 105,925.47 × 20,688.98
  4. Step 4: Simplify right side
    70,607.26x = 2,191,489,826.88
  5. Step 5: Solve for x
    x = 2,191,489,826.88/70,607.26
  6. Step 6: Final answer
    x = 31,037.74

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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.