Finding the Fourth Proportional to 128,317,712.55, 192,399,702.54 and 40,841,444.07
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Solution
The fourth proportional to 128,317,712.55, 192,399,702.54 and 40,841,444.07 is: 61,237,700.81
Step by Step Solution
- Step 1: Write the proportion equation
128,317,712.55 : 192,399,702.54 = 40,841,444.07 : x - Step 2: Convert to fraction form
128,317,712.55/192,399,702.54 = 40,841,444.07/x - Step 3: Cross multiply
128,317,712.55x = 192,399,702.54 × 40,841,444.07 - Step 4: Simplify right side
128,317,712.55x = 7,857,881,690,372,047 - Step 5: Solve for x
x = 7,857,881,690,372,047/128,317,712.55 - Step 6: Final answer
x = 61,237,700.81
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1.5x scale
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.