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Finding the Fourth Proportional to 211,047.40, 316,302.30 and 86,247.40

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Solution

The fourth proportional to 211,047.40, 316,302.30 and 86,247.40 is: 129,261.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,047.40 : 316,302.30 = 86,247.40 : x
  2. Step 2: Convert to fraction form
    211,047.40/316,302.30 = 86,247.40/x
  3. Step 3: Cross multiply
    211,047.40x = 316,302.30 × 86,247.40
  4. Step 4: Simplify right side
    211,047.40x = 27,280,250,989.02
  5. Step 5: Solve for x
    x = 27,280,250,989.02/211,047.40
  6. Step 6: Final answer
    x = 129,261.25

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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.