Finding the Fourth Proportional to 128,578,342.08, 177,452,831.36 and 72,078,347.99
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Solution
The fourth proportional to 128,578,342.08, 177,452,831.36 and 72,078,347.99 is: 99,476,371.55
Step by Step Solution
- Step 1: Write the proportion equation
128,578,342.08 : 177,452,831.36 = 72,078,347.99 : x - Step 2: Convert to fraction form
128,578,342.08/177,452,831.36 = 72,078,347.99/x - Step 3: Cross multiply
128,578,342.08x = 177,452,831.36 × 72,078,347.99 - Step 4: Simplify right side
128,578,342.08x = 12,790,506,929,649,748 - Step 5: Solve for x
x = 12,790,506,929,649,748/128,578,342.08 - Step 6: Final answer
x = 99,476,371.55
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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.