Home / 74,681.20-112,021.80-66,516.40

Finding the Fourth Proportional to 74,681.20, 112,021.80 and 66,516.40

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Solution

The fourth proportional to 74,681.20, 112,021.80 and 66,516.40 is: 99,774.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,681.20 : 112,021.80 = 66,516.40 : x
  2. Step 2: Convert to fraction form
    74,681.20/112,021.80 = 66,516.40/x
  3. Step 3: Cross multiply
    74,681.20x = 112,021.80 × 66,516.40
  4. Step 4: Simplify right side
    74,681.20x = 7,451,286,857.52
  5. Step 5: Solve for x
    x = 7,451,286,857.52/74,681.20
  6. Step 6: Final answer
    x = 99,774.60

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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.