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Finding the Fourth Proportional to 163,540.64, 245,259.12 and 70,021.28

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Solution

The fourth proportional to 163,540.64, 245,259.12 and 70,021.28 is: 105,009.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,540.64 : 245,259.12 = 70,021.28 : x
  2. Step 2: Convert to fraction form
    163,540.64/245,259.12 = 70,021.28/x
  3. Step 3: Cross multiply
    163,540.64x = 245,259.12 × 70,021.28
  4. Step 4: Simplify right side
    163,540.64x = 17,173,357,514.07
  5. Step 5: Solve for x
    x = 17,173,357,514.07/163,540.64
  6. Step 6: Final answer
    x = 105,009.72

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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.