Finding the Fourth Proportional to 121,128,215.80, 181,692,323.70 and 70,109,879.80
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Solution
The fourth proportional to 121,128,215.80, 181,692,323.70 and 70,109,879.80 is: 105,164,819.70
Step by Step Solution
- Step 1: Write the proportion equation
121,128,215.80 : 181,692,323.70 = 70,109,879.80 : x - Step 2: Convert to fraction form
121,128,215.80/181,692,323.70 = 70,109,879.80/x - Step 3: Cross multiply
121,128,215.80x = 181,692,323.70 × 70,109,879.80 - Step 4: Simplify right side
121,128,215.80x = 12,738,426,975,189,690 - Step 5: Solve for x
x = 12,738,426,975,189,690/121,128,215.80 - Step 6: Final answer
x = 105,164,819.70
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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.