Finding the Fourth Proportional to 128,547,323.76, 177,421,054.68 and 76,365,348.24
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Solution
The fourth proportional to 128,547,323.76, 177,421,054.68 and 76,365,348.24 is: 105,399,476.47
Step by Step Solution
- Step 1: Write the proportion equation
128,547,323.76 : 177,421,054.68 = 76,365,348.24 : x - Step 2: Convert to fraction form
128,547,323.76/177,421,054.68 = 76,365,348.24/x - Step 3: Cross multiply
128,547,323.76x = 177,421,054.68 × 76,365,348.24 - Step 4: Simplify right side
128,547,323.76x = 13,548,820,625,746,282 - Step 5: Solve for x
x = 13,548,820,625,746,282/128,547,323.76 - Step 6: Final answer
x = 105,399,476.47
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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.