Home / 102,657.20-153,985.80-71,164.40

Finding the Fourth Proportional to 102,657.20, 153,985.80 and 71,164.40

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Solution

The fourth proportional to 102,657.20, 153,985.80 and 71,164.40 is: 106,746.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,657.20 : 153,985.80 = 71,164.40 : x
  2. Step 2: Convert to fraction form
    102,657.20/153,985.80 = 71,164.40/x
  3. Step 3: Cross multiply
    102,657.20x = 153,985.80 × 71,164.40
  4. Step 4: Simplify right side
    102,657.20x = 10,958,307,065.52
  5. Step 5: Solve for x
    x = 10,958,307,065.52/102,657.20
  6. Step 6: Final answer
    x = 106,746.60

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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.