Finding the Fourth Proportional to 81,243,595.68, 121,020,992.76 and 76,843,176.72
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Solution
The fourth proportional to 81,243,595.68, 121,020,992.76 and 76,843,176.72 is: 114,466,099.83
Step by Step Solution
- Step 1: Write the proportion equation
81,243,595.68 : 121,020,992.76 = 76,843,176.72 : x - Step 2: Convert to fraction form
81,243,595.68/121,020,992.76 = 76,843,176.72/x - Step 3: Cross multiply
81,243,595.68x = 121,020,992.76 × 76,843,176.72 - Step 4: Simplify right side
81,243,595.68x = 9,299,637,533,486,520 - Step 5: Solve for x
x = 9,299,637,533,486,520/81,243,595.68 - Step 6: Final answer
x = 114,466,099.83
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.