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Finding the Fourth Proportional to 169,985.40, 254,978.10 and 70,112.40

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Solution

The fourth proportional to 169,985.40, 254,978.10 and 70,112.40 is: 105,168.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,985.40 : 254,978.10 = 70,112.40 : x
  2. Step 2: Convert to fraction form
    169,985.40/254,978.10 = 70,112.40/x
  3. Step 3: Cross multiply
    169,985.40x = 254,978.10 × 70,112.40
  4. Step 4: Simplify right side
    169,985.40x = 17,877,126,538.44
  5. Step 5: Solve for x
    x = 17,877,126,538.44/169,985.40
  6. Step 6: Final answer
    x = 105,168.60

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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.