Home / 66,489.40-91,771.12-38,211.48

Finding the Fourth Proportional to 66,489.40, 91,771.12 and 38,211.48

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Solution

The fourth proportional to 66,489.40, 91,771.12 and 38,211.48 is: 52,740.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,489.40 : 91,771.12 = 38,211.48 : x
  2. Step 2: Convert to fraction form
    66,489.40/91,771.12 = 38,211.48/x
  3. Step 3: Cross multiply
    66,489.40x = 91,771.12 × 38,211.48
  4. Step 4: Simplify right side
    66,489.40x = 3,506,710,316.46
  5. Step 5: Solve for x
    x = 3,506,710,316.46/66,489.40
  6. Step 6: Final answer
    x = 52,740.89

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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.