Home / 102,007.20-153,010.80-78,387.60

Finding the Fourth Proportional to 102,007.20, 153,010.80 and 78,387.60

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Solution

The fourth proportional to 102,007.20, 153,010.80 and 78,387.60 is: 117,581.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,007.20 : 153,010.80 = 78,387.60 : x
  2. Step 2: Convert to fraction form
    102,007.20/153,010.80 = 78,387.60/x
  3. Step 3: Cross multiply
    102,007.20x = 153,010.80 × 78,387.60
  4. Step 4: Simplify right side
    102,007.20x = 11,994,149,386.08
  5. Step 5: Solve for x
    x = 11,994,149,386.08/102,007.20
  6. Step 6: Final answer
    x = 117,581.40

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1.5x scale

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.