Finding the Fourth Proportional to 91,291,778.80, 125,995,573.94 and 56,495,678.92
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Solution
The fourth proportional to 91,291,778.80, 125,995,573.94 and 56,495,678.92 is: 77,972,031.92
Step by Step Solution
- Step 1: Write the proportion equation
91,291,778.80 : 125,995,573.94 = 56,495,678.92 : x - Step 2: Convert to fraction form
91,291,778.80/125,995,573.94 = 56,495,678.92/x - Step 3: Cross multiply
91,291,778.80x = 125,995,573.94 × 56,495,678.92 - Step 4: Simplify right side
91,291,778.80x = 7,118,205,490,655,359 - Step 5: Solve for x
x = 7,118,205,490,655,359/91,291,778.80 - Step 6: Final answer
x = 77,972,031.92
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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.