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Finding the Fourth Proportional to 118,085.70, 177,128.55 and 103,323.45

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Solution

The fourth proportional to 118,085.70, 177,128.55 and 103,323.45 is: 154,985.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,085.70 : 177,128.55 = 103,323.45 : x
  2. Step 2: Convert to fraction form
    118,085.70/177,128.55 = 103,323.45/x
  3. Step 3: Cross multiply
    118,085.70x = 177,128.55 × 103,323.45
  4. Step 4: Simplify right side
    118,085.70x = 18,301,532,879.50
  5. Step 5: Solve for x
    x = 18,301,532,879.50/118,085.70
  6. Step 6: Final answer
    x = 154,985.18

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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.