Finding the Fourth Proportional to 81,478,798.09, 112,736,828.94 and 71,046,568.21
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Solution
The fourth proportional to 81,478,798.09, 112,736,828.94 and 71,046,568.21 is: 98,302,441.80
Step by Step Solution
- Step 1: Write the proportion equation
81,478,798.09 : 112,736,828.94 = 71,046,568.21 : x - Step 2: Convert to fraction form
81,478,798.09/112,736,828.94 = 71,046,568.21/x - Step 3: Cross multiply
81,478,798.09x = 112,736,828.94 × 71,046,568.21 - Step 4: Simplify right side
81,478,798.09x = 8,009,564,807,064,811 - Step 5: Solve for x
x = 8,009,564,807,064,811/81,478,798.09 - Step 6: Final answer
x = 98,302,441.80
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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.