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Finding the Fourth Proportional to 157,037.70, 216,715.60 and 85,421.56

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Solution

The fourth proportional to 157,037.70, 216,715.60 and 85,421.56 is: 117,883.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,037.70 : 216,715.60 = 85,421.56 : x
  2. Step 2: Convert to fraction form
    157,037.70/216,715.60 = 85,421.56/x
  3. Step 3: Cross multiply
    157,037.70x = 216,715.60 × 85,421.56
  4. Step 4: Simplify right side
    157,037.70x = 18,512,184,628.34
  5. Step 5: Solve for x
    x = 18,512,184,628.34/157,037.70
  6. Step 6: Final answer
    x = 117,883.70

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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.