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Finding the Fourth Proportional to 66,438.40, 92,319.80 and 65,600.06

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Solution

The fourth proportional to 66,438.40, 92,319.80 and 65,600.06 is: 91,154.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,438.40 : 92,319.80 = 65,600.06 : x
  2. Step 2: Convert to fraction form
    66,438.40/92,319.80 = 65,600.06/x
  3. Step 3: Cross multiply
    66,438.40x = 92,319.80 × 65,600.06
  4. Step 4: Simplify right side
    66,438.40x = 6,056,184,419.19
  5. Step 5: Solve for x
    x = 6,056,184,419.19/66,438.40
  6. Step 6: Final answer
    x = 91,154.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.