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Finding the Fourth Proportional to 128,219.70, 176,946.72 and 70,862.74

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Solution

The fourth proportional to 128,219.70, 176,946.72 and 70,862.74 is: 97,792.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,219.70 : 176,946.72 = 70,862.74 : x
  2. Step 2: Convert to fraction form
    128,219.70/176,946.72 = 70,862.74/x
  3. Step 3: Cross multiply
    128,219.70x = 176,946.72 × 70,862.74
  4. Step 4: Simplify right side
    128,219.70x = 12,538,928,904.41
  5. Step 5: Solve for x
    x = 12,538,928,904.41/128,219.70
  6. Step 6: Final answer
    x = 97,792.53

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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.