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Finding the Fourth Proportional to 66,458.75, 99,700.70 and 21,492.18

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Solution

The fourth proportional to 66,458.75, 99,700.70 and 21,492.18 is: 32,242.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,458.75 : 99,700.70 = 21,492.18 : x
  2. Step 2: Convert to fraction form
    66,458.75/99,700.70 = 21,492.18/x
  3. Step 3: Cross multiply
    66,458.75x = 99,700.70 × 21,492.18
  4. Step 4: Simplify right side
    66,458.75x = 2,142,785,283.07
  5. Step 5: Solve for x
    x = 2,142,785,283.07/66,458.75
  6. Step 6: Final answer
    x = 32,242.34

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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.