Finding the Fourth Proportional to 128,460,607.48, 177,278,281.32 and 72,706,023.82
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Solution
The fourth proportional to 128,460,607.48, 177,278,281.32 and 72,706,023.82 is: 100,335,808.75
Step by Step Solution
- Step 1: Write the proportion equation
128,460,607.48 : 177,278,281.32 = 72,706,023.82 : x - Step 2: Convert to fraction form
128,460,607.48/177,278,281.32 = 72,706,023.82/x - Step 3: Cross multiply
128,460,607.48x = 177,278,281.32 × 72,706,023.82 - Step 4: Simplify right side
128,460,607.48x = 12,889,198,944,420,580 - Step 5: Solve for x
x = 12,889,198,944,420,580/128,460,607.48 - Step 6: Final answer
x = 100,335,808.75
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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.