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Finding the Fourth Proportional to 216,079.04, 324,153.12 and 91,421.12

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Solution

The fourth proportional to 216,079.04, 324,153.12 and 91,421.12 is: 137,146.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,079.04 : 324,153.12 = 91,421.12 : x
  2. Step 2: Convert to fraction form
    216,079.04/324,153.12 = 91,421.12/x
  3. Step 3: Cross multiply
    216,079.04x = 324,153.12 × 91,421.12
  4. Step 4: Simplify right side
    216,079.04x = 29,634,441,281.89
  5. Step 5: Solve for x
    x = 29,634,441,281.89/216,079.04
  6. Step 6: Final answer
    x = 137,146.30

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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.