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Finding the Fourth Proportional to 70,416.64, 97,174.95 and 42,128.98

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Solution

The fourth proportional to 70,416.64, 97,174.95 and 42,128.98 is: 58,137.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,416.64 : 97,174.95 = 42,128.98 : x
  2. Step 2: Convert to fraction form
    70,416.64/97,174.95 = 42,128.98/x
  3. Step 3: Cross multiply
    70,416.64x = 97,174.95 × 42,128.98
  4. Step 4: Simplify right side
    70,416.64x = 4,093,881,525.05
  5. Step 5: Solve for x
    x = 4,093,881,525.05/70,416.64
  6. Step 6: Final answer
    x = 58,137.98

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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.