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Finding the Fourth Proportional to 72,461.70, 99,881.58 and 57,123.24

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Solution

The fourth proportional to 72,461.70, 99,881.58 and 57,123.24 is: 78,738.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,461.70 : 99,881.58 = 57,123.24 : x
  2. Step 2: Convert to fraction form
    72,461.70/99,881.58 = 57,123.24/x
  3. Step 3: Cross multiply
    72,461.70x = 99,881.58 × 57,123.24
  4. Step 4: Simplify right side
    72,461.70x = 5,705,559,465.92
  5. Step 5: Solve for x
    x = 5,705,559,465.92/72,461.70
  6. Step 6: Final answer
    x = 78,738.97

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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.