Finding the Fourth Proportional to 163,733,557.20, 245,600,335.80 and 77,640,115.20
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Solution
The fourth proportional to 163,733,557.20, 245,600,335.80 and 77,640,115.20 is: 116,460,172.80
Step by Step Solution
- Step 1: Write the proportion equation
163,733,557.20 : 245,600,335.80 = 77,640,115.20 : x - Step 2: Convert to fraction form
163,733,557.20/245,600,335.80 = 77,640,115.20/x - Step 3: Cross multiply
163,733,557.20x = 245,600,335.80 × 77,640,115.20 - Step 4: Simplify right side
163,733,557.20x = 19,068,438,364,670,684 - Step 5: Solve for x
x = 19,068,438,364,670,684/163,733,557.20 - Step 6: Final answer
x = 116,460,172.80
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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.