Finding the Fourth Proportional to 130,478,984.91, 180,056,156.63 and 71,738,155.08
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Solution
The fourth proportional to 130,478,984.91, 180,056,156.63 and 71,738,155.08 is: 98,995,991.55
Step by Step Solution
- Step 1: Write the proportion equation
130,478,984.91 : 180,056,156.63 = 71,738,155.08 : x - Step 2: Convert to fraction form
130,478,984.91/180,056,156.63 = 71,738,155.08/x - Step 3: Cross multiply
130,478,984.91x = 180,056,156.63 × 71,738,155.08 - Step 4: Simplify right side
130,478,984.91x = 12,916,896,487,073,020 - Step 5: Solve for x
x = 12,916,896,487,073,020/130,478,984.91 - Step 6: Final answer
x = 98,995,991.55
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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.