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Finding the Fourth Proportional to 70,155.78, 105,707.26 and 57,949.26

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Solution

The fourth proportional to 70,155.78, 105,707.26 and 57,949.26 is: 87,315.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,155.78 : 105,707.26 = 57,949.26 : x
  2. Step 2: Convert to fraction form
    70,155.78/105,707.26 = 57,949.26/x
  3. Step 3: Cross multiply
    70,155.78x = 105,707.26 × 57,949.26
  4. Step 4: Simplify right side
    70,155.78x = 6,125,657,493.63
  5. Step 5: Solve for x
    x = 6,125,657,493.63/70,155.78
  6. Step 6: Final answer
    x = 87,315.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.