Finding the Fourth Proportional to 128,758,645.40, 193,137,968.10 and 117,043,323.80
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Solution
The fourth proportional to 128,758,645.40, 193,137,968.10 and 117,043,323.80 is: 175,564,985.70
Step by Step Solution
- Step 1: Write the proportion equation
128,758,645.40 : 193,137,968.10 = 117,043,323.80 : x - Step 2: Convert to fraction form
128,758,645.40/193,137,968.10 = 117,043,323.80/x - Step 3: Cross multiply
128,758,645.40x = 193,137,968.10 × 117,043,323.80 - Step 4: Simplify right side
128,758,645.40x = 22,605,509,738,402,368 - Step 5: Solve for x
x = 22,605,509,738,402,368/128,758,645.40 - Step 6: Final answer
x = 175,564,985.70
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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.