Finding the Fourth Proportional to 7,129,703,979.42, 9,838,497,756.15 and 3,957,638,053.02
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Solution
The fourth proportional to 7,129,703,979.42, 9,838,497,756.15 and 3,957,638,053.02 is: 5,461,266,444.82
Step by Step Solution
- Step 1: Write the proportion equation
7,129,703,979.42 : 9,838,497,756.15 = 3,957,638,053.02 : x - Step 2: Convert to fraction form
7,129,703,979.42/9,838,497,756.15 = 3,957,638,053.02/x - Step 3: Cross multiply
7,129,703,979.42x = 9,838,497,756.15 × 3,957,638,053.02 - Step 4: Simplify right side
7,129,703,979.42x = 38,937,213,104,291,119,104 - Step 5: Solve for x
x = 38,937,213,104,291,119,104/7,129,703,979.42 - Step 6: Final answer
x = 5,461,266,444.82
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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.