Finding the Fourth Proportional to 128,482,341.60, 192,788,830.80 and 85,381,528.80
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Solution
The fourth proportional to 128,482,341.60, 192,788,830.80 and 85,381,528.80 is: 128,115,699.83
Step by Step Solution
- Step 1: Write the proportion equation
128,482,341.60 : 192,788,830.80 = 85,381,528.80 : x - Step 2: Convert to fraction form
128,482,341.60/192,788,830.80 = 85,381,528.80/x - Step 3: Cross multiply
128,482,341.60x = 192,788,830.80 × 85,381,528.80 - Step 4: Simplify right side
128,482,341.60x = 16,460,605,109,268,528 - Step 5: Solve for x
x = 16,460,605,109,268,528/128,482,341.60 - Step 6: Final answer
x = 128,115,699.83
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.