Home / 128,112.46-176,795.50-70,750.74

Finding the Fourth Proportional to 128,112.46, 176,795.50 and 70,750.74

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Solution

The fourth proportional to 128,112.46, 176,795.50 and 70,750.74 is: 97,636.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,112.46 : 176,795.50 = 70,750.74 : x
  2. Step 2: Convert to fraction form
    128,112.46/176,795.50 = 70,750.74/x
  3. Step 3: Cross multiply
    128,112.46x = 176,795.50 × 70,750.74
  4. Step 4: Simplify right side
    128,112.46x = 12,508,411,834.80
  5. Step 5: Solve for x
    x = 12,508,411,834.80/128,112.46
  6. Step 6: Final answer
    x = 97,636.18

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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.