Finding the Fourth Proportional to 128,792,862.09, 177,833,911.86 and 98,976,281.76
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Solution
The fourth proportional to 128,792,862.09, 177,833,911.86 and 98,976,281.76 is: 136,663,935.26
Step by Step Solution
- Step 1: Write the proportion equation
128,792,862.09 : 177,833,911.86 = 98,976,281.76 : x - Step 2: Convert to fraction form
128,792,862.09/177,833,911.86 = 98,976,281.76/x - Step 3: Cross multiply
128,792,862.09x = 177,833,911.86 × 98,976,281.76 - Step 4: Simplify right side
128,792,862.09x = 17,601,339,366,738,368 - Step 5: Solve for x
x = 17,601,339,366,738,368/128,792,862.09 - Step 6: Final answer
x = 136,663,935.26
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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.