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Finding the Fourth Proportional to 70,645.45, 97,490.43 and 40,430.63

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Solution

The fourth proportional to 70,645.45, 97,490.43 and 40,430.63 is: 55,794.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,645.45 : 97,490.43 = 40,430.63 : x
  2. Step 2: Convert to fraction form
    70,645.45/97,490.43 = 40,430.63/x
  3. Step 3: Cross multiply
    70,645.45x = 97,490.43 × 40,430.63
  4. Step 4: Simplify right side
    70,645.45x = 3,941,599,503.87
  5. Step 5: Solve for x
    x = 3,941,599,503.87/70,645.45
  6. Step 6: Final answer
    x = 55,794.10

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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.