Finding the Fourth Proportional to 81,139,191.28, 121,417,858.80 and 70,246,847.44
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Solution
The fourth proportional to 81,139,191.28, 121,417,858.80 and 70,246,847.44 is: 105,118,398.02
Step by Step Solution
- Step 1: Write the proportion equation
81,139,191.28 : 121,417,858.80 = 70,246,847.44 : x - Step 2: Convert to fraction form
81,139,191.28/121,417,858.80 = 70,246,847.44/x - Step 3: Cross multiply
81,139,191.28x = 121,417,858.80 × 70,246,847.44 - Step 4: Simplify right side
81,139,191.28x = 8,529,221,803,615,061 - Step 5: Solve for x
x = 8,529,221,803,615,061/81,139,191.28 - Step 6: Final answer
x = 105,118,398.02
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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.