Finding the Fourth Proportional to 7,129,703,987.42, 9,838,497,767.19 and 3,957,638,061.02
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Solution
The fourth proportional to 7,129,703,987.42, 9,838,497,767.19 and 3,957,638,061.02 is: 5,461,266,455.86
Step by Step Solution
- Step 1: Write the proportion equation
7,129,703,987.42 : 9,838,497,767.19 = 3,957,638,061.02 : x - Step 2: Convert to fraction form
7,129,703,987.42/9,838,497,767.19 = 3,957,638,061.02/x - Step 3: Cross multiply
7,129,703,987.42x = 9,838,497,767.19 × 3,957,638,061.02 - Step 4: Simplify right side
7,129,703,987.42x = 38,937,213,226,691,436,544 - Step 5: Solve for x
x = 38,937,213,226,691,436,544/7,129,703,987.42 - Step 6: Final answer
x = 5,461,266,455.86
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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.