Finding the Fourth Proportional to 77,669,468.64, 107,186,438.70 and 42,389,200.08
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Solution
The fourth proportional to 77,669,468.64, 107,186,438.70 and 42,389,200.08 is: 58,498,499.80
Step by Step Solution
- Step 1: Write the proportion equation
77,669,468.64 : 107,186,438.70 = 42,389,200.08 : x - Step 2: Convert to fraction form
77,669,468.64/107,186,438.70 = 42,389,200.08/x - Step 3: Cross multiply
77,669,468.64x = 107,186,438.70 × 42,389,200.08 - Step 4: Simplify right side
77,669,468.64x = 4,543,547,395,916,955 - Step 5: Solve for x
x = 4,543,547,395,916,955/77,669,468.64 - Step 6: Final answer
x = 58,498,499.80
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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.