Finding the Fourth Proportional to 139,653,663.60, 192,708,247.64 and 77,779,758.96
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Solution
The fourth proportional to 139,653,663.60, 192,708,247.64 and 77,779,758.96 is: 107,328,376.96
Step by Step Solution
- Step 1: Write the proportion equation
139,653,663.60 : 192,708,247.64 = 77,779,758.96 : x - Step 2: Convert to fraction form
139,653,663.60/192,708,247.64 = 77,779,758.96/x - Step 3: Cross multiply
139,653,663.60x = 192,708,247.64 × 77,779,758.96 - Step 4: Simplify right side
139,653,663.60x = 14,988,801,051,043,186 - Step 5: Solve for x
x = 14,988,801,051,043,186/139,653,663.60 - Step 6: Final answer
x = 107,328,376.96
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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.