Finding the Fourth Proportional to 85,878,005.80, 128,817,008.70 and 68,871,893.80
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Solution
The fourth proportional to 85,878,005.80, 128,817,008.70 and 68,871,893.80 is: 103,307,840.70
Step by Step Solution
- Step 1: Write the proportion equation
85,878,005.80 : 128,817,008.70 = 68,871,893.80 : x - Step 2: Convert to fraction form
85,878,005.80/128,817,008.70 = 68,871,893.80/x - Step 3: Cross multiply
85,878,005.80x = 128,817,008.70 × 68,871,893.80 - Step 4: Simplify right side
85,878,005.80x = 8,871,871,342,820,076 - Step 5: Solve for x
x = 8,871,871,342,820,076/85,878,005.80 - Step 6: Final answer
x = 103,307,840.70
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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.