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Finding the Fourth Proportional to 145,851.08, 218,693.10 and 86,728.04

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Solution

The fourth proportional to 145,851.08, 218,693.10 and 86,728.04 is: 130,042.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,851.08 : 218,693.10 = 86,728.04 : x
  2. Step 2: Convert to fraction form
    145,851.08/218,693.10 = 86,728.04/x
  3. Step 3: Cross multiply
    145,851.08x = 218,693.10 × 86,728.04
  4. Step 4: Simplify right side
    145,851.08x = 18,966,823,924.52
  5. Step 5: Solve for x
    x = 18,966,823,924.52/145,851.08
  6. Step 6: Final answer
    x = 130,042.40

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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.