Home / 117,421.60-162,048.72-66,438.76

Finding the Fourth Proportional to 117,421.60, 162,048.72 and 66,438.76

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Solution

The fourth proportional to 117,421.60, 162,048.72 and 66,438.76 is: 91,689.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,421.60 : 162,048.72 = 66,438.76 : x
  2. Step 2: Convert to fraction form
    117,421.60/162,048.72 = 66,438.76/x
  3. Step 3: Cross multiply
    117,421.60x = 162,048.72 × 66,438.76
  4. Step 4: Simplify right side
    117,421.60x = 10,766,316,016.39
  5. Step 5: Solve for x
    x = 10,766,316,016.39/117,421.60
  6. Step 6: Final answer
    x = 91,689.40

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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.