Home / 128,334.15-177,102.30-70,970.50

Finding the Fourth Proportional to 128,334.15, 177,102.30 and 70,970.50

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Solution

The fourth proportional to 128,334.15, 177,102.30 and 70,970.50 is: 97,939.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,334.15 : 177,102.30 = 70,970.50 : x
  2. Step 2: Convert to fraction form
    128,334.15/177,102.30 = 70,970.50/x
  3. Step 3: Cross multiply
    128,334.15x = 177,102.30 × 70,970.50
  4. Step 4: Simplify right side
    128,334.15x = 12,569,038,782.15
  5. Step 5: Solve for x
    x = 12,569,038,782.15/128,334.15
  6. Step 6: Final answer
    x = 97,939.94

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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.