Finding the Fourth Proportional to 129,416,779.41, 178,599,562.38 and 76,538,815.17
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Solution
The fourth proportional to 129,416,779.41, 178,599,562.38 and 76,538,815.17 is: 105,626,171.17
Step by Step Solution
- Step 1: Write the proportion equation
129,416,779.41 : 178,599,562.38 = 76,538,815.17 : x - Step 2: Convert to fraction form
129,416,779.41/178,599,562.38 = 76,538,815.17/x - Step 3: Cross multiply
129,416,779.41x = 178,599,562.38 × 76,538,815.17 - Step 4: Simplify right side
129,416,779.41x = 13,669,798,894,445,706 - Step 5: Solve for x
x = 13,669,798,894,445,706/129,416,779.41 - Step 6: Final answer
x = 105,626,171.17
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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.