Finding the Fourth Proportional to 121,872,973.20, 168,184,684.76 and 69,663,129.88
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Solution
The fourth proportional to 121,872,973.20, 168,184,684.76 and 69,663,129.88 is: 96,135,108.80
Step by Step Solution
- Step 1: Write the proportion equation
121,872,973.20 : 168,184,684.76 = 69,663,129.88 : x - Step 2: Convert to fraction form
121,872,973.20/168,184,684.76 = 69,663,129.88/x - Step 3: Cross multiply
121,872,973.20x = 168,184,684.76 × 69,663,129.88 - Step 4: Simplify right side
121,872,973.20x = 11,716,271,538,262,736 - Step 5: Solve for x
x = 11,716,271,538,262,736/121,872,973.20 - Step 6: Final answer
x = 96,135,108.80
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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.