Finding the Fourth Proportional to 128,788,994.18, 177,712,664.64 and 87,063,848.12
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Solution
The fourth proportional to 128,788,994.18, 177,712,664.64 and 87,063,848.12 is: 120,137,194.50
Step by Step Solution
- Step 1: Write the proportion equation
128,788,994.18 : 177,712,664.64 = 87,063,848.12 : x - Step 2: Convert to fraction form
128,788,994.18/177,712,664.64 = 87,063,848.12/x - Step 3: Cross multiply
128,788,994.18x = 177,712,664.64 × 87,063,848.12 - Step 4: Simplify right side
128,788,994.18x = 15,472,348,443,217,454 - Step 5: Solve for x
x = 15,472,348,443,217,454/128,788,994.18 - Step 6: Final answer
x = 120,137,194.50
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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.