Finding the Fourth Proportional to 312,736,931.26, 431,568,748.20 and 171,607,718.09
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Solution
The fourth proportional to 312,736,931.26, 431,568,748.20 and 171,607,718.09 is: 236,814,142.09
Step by Step Solution
- Step 1: Write the proportion equation
312,736,931.26 : 431,568,748.20 = 171,607,718.09 : x - Step 2: Convert to fraction form
312,736,931.26/431,568,748.20 = 171,607,718.09/x - Step 3: Cross multiply
312,736,931.26x = 431,568,748.20 × 171,607,718.09 - Step 4: Simplify right side
312,736,931.26x = 74,060,528,077,559,792 - Step 5: Solve for x
x = 74,060,528,077,559,792/312,736,931.26 - Step 6: Final answer
x = 236,814,142.09
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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.