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Finding the Fourth Proportional to 91,718.10, 137,404.35 and 47,193.30

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Solution

The fourth proportional to 91,718.10, 137,404.35 and 47,193.30 is: 70,701.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,718.10 : 137,404.35 = 47,193.30 : x
  2. Step 2: Convert to fraction form
    91,718.10/137,404.35 = 47,193.30/x
  3. Step 3: Cross multiply
    91,718.10x = 137,404.35 × 47,193.30
  4. Step 4: Simplify right side
    91,718.10x = 6,484,564,710.86
  5. Step 5: Solve for x
    x = 6,484,564,710.86/91,718.10
  6. Step 6: Final answer
    x = 70,701.04

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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.