Finding the Fourth Proportional to 128,021,449.96, 191,838,197.76 and 84,735,580.51
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Solution
The fourth proportional to 128,021,449.96, 191,838,197.76 and 84,735,580.51 is: 126,974,980.02
Step by Step Solution
- Step 1: Write the proportion equation
128,021,449.96 : 191,838,197.76 = 84,735,580.51 : x - Step 2: Convert to fraction form
128,021,449.96/191,838,197.76 = 84,735,580.51/x - Step 3: Cross multiply
128,021,449.96x = 191,838,197.76 × 84,735,580.51 - Step 4: Simplify right side
128,021,449.96x = 16,255,521,051,185,782 - Step 5: Solve for x
x = 16,255,521,051,185,782/128,021,449.96 - Step 6: Final answer
x = 126,974,980.02
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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.