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Finding the Fourth Proportional to 72,543.88, 100,084.62 and 45,688.06

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Solution

The fourth proportional to 72,543.88, 100,084.62 and 45,688.06 is: 63,033.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,543.88 : 100,084.62 = 45,688.06 : x
  2. Step 2: Convert to fraction form
    72,543.88/100,084.62 = 45,688.06/x
  3. Step 3: Cross multiply
    72,543.88x = 100,084.62 × 45,688.06
  4. Step 4: Simplify right side
    72,543.88x = 4,572,672,123.64
  5. Step 5: Solve for x
    x = 4,572,672,123.64/72,543.88
  6. Step 6: Final answer
    x = 63,033.19

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1.5x scale

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.