Finding the Fourth Proportional to 121,991,797.61, 168,351,605.58 and 66,239,567.86
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Solution
The fourth proportional to 121,991,797.61, 168,351,605.58 and 66,239,567.86 is: 91,412,191.81
Step by Step Solution
- Step 1: Write the proportion equation
121,991,797.61 : 168,351,605.58 = 66,239,567.86 : x - Step 2: Convert to fraction form
121,991,797.61/168,351,605.58 = 66,239,567.86/x - Step 3: Cross multiply
121,991,797.61x = 168,351,605.58 × 66,239,567.86 - Step 4: Simplify right side
121,991,797.61x = 11,151,537,602,434,064 - Step 5: Solve for x
x = 11,151,537,602,434,064/121,991,797.61 - Step 6: Final answer
x = 91,412,191.81
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.