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Finding the Fourth Proportional to 66,478.40, 99,571.80 and 59,091.20

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Solution

The fourth proportional to 66,478.40, 99,571.80 and 59,091.20 is: 88,507.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,478.40 : 99,571.80 = 59,091.20 : x
  2. Step 2: Convert to fraction form
    66,478.40/99,571.80 = 59,091.20/x
  3. Step 3: Cross multiply
    66,478.40x = 99,571.80 × 59,091.20
  4. Step 4: Simplify right side
    66,478.40x = 5,883,817,148.16
  5. Step 5: Solve for x
    x = 5,883,817,148.16/66,478.40
  6. Step 6: Final answer
    x = 88,507.20

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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.