Home / 66,421.20-91,598.40-51,289.86

Finding the Fourth Proportional to 66,421.20, 91,598.40 and 51,289.86

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Solution

The fourth proportional to 66,421.20, 91,598.40 and 51,289.86 is: 70,731.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,421.20 : 91,598.40 = 51,289.86 : x
  2. Step 2: Convert to fraction form
    66,421.20/91,598.40 = 51,289.86/x
  3. Step 3: Cross multiply
    66,421.20x = 91,598.40 × 51,289.86
  4. Step 4: Simplify right side
    66,421.20x = 4,698,069,112.22
  5. Step 5: Solve for x
    x = 4,698,069,112.22/66,421.20
  6. Step 6: Final answer
    x = 70,731.47

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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.