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Finding the Fourth Proportional to 153,668.79, 212,065.54 and 84,766.16

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Solution

The fourth proportional to 153,668.79, 212,065.54 and 84,766.16 is: 116,978.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,668.79 : 212,065.54 = 84,766.16 : x
  2. Step 2: Convert to fraction form
    153,668.79/212,065.54 = 84,766.16/x
  3. Step 3: Cross multiply
    153,668.79x = 212,065.54 × 84,766.16
  4. Step 4: Simplify right side
    153,668.79x = 17,975,982,289.18
  5. Step 5: Solve for x
    x = 17,975,982,289.18/153,668.79
  6. Step 6: Final answer
    x = 116,978.75

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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.