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Finding the Fourth Proportional to 65,671.12, 90,603.66 and 37,369.72

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Solution

The fourth proportional to 65,671.12, 90,603.66 and 37,369.72 is: 51,557.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,671.12 : 90,603.66 = 37,369.72 : x
  2. Step 2: Convert to fraction form
    65,671.12/90,603.66 = 37,369.72/x
  3. Step 3: Cross multiply
    65,671.12x = 90,603.66 × 37,369.72
  4. Step 4: Simplify right side
    65,671.12x = 3,385,833,405.18
  5. Step 5: Solve for x
    x = 3,385,833,405.18/65,671.12
  6. Step 6: Final answer
    x = 51,557.42

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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.