Finding the Fourth Proportional to 7,129,703,917.22, 9,838,497,670.34 and 3,957,637,990.68
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Solution
The fourth proportional to 7,129,703,917.22, 9,838,497,670.34 and 3,957,637,990.68 is: 5,461,266,358.81
Step by Step Solution
- Step 1: Write the proportion equation
7,129,703,917.22 : 9,838,497,670.34 = 3,957,637,990.68 : x - Step 2: Convert to fraction form
7,129,703,917.22/9,838,497,670.34 = 3,957,637,990.68/x - Step 3: Cross multiply
7,129,703,917.22x = 9,838,497,670.34 × 3,957,637,990.68 - Step 4: Simplify right side
7,129,703,917.22x = 38,937,212,151,334,461,440 - Step 5: Solve for x
x = 38,937,212,151,334,461,440/7,129,703,917.22 - Step 6: Final answer
x = 5,461,266,358.81
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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.