Home / 128,148.72-176,855-94,312.12

Finding the Fourth Proportional to 128,148.72, 176,855 and 94,312.12

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Solution

The fourth proportional to 128,148.72, 176,855 and 94,312.12 is: 130,157.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,148.72 : 176,855 = 94,312.12 : x
  2. Step 2: Convert to fraction form
    128,148.72/176,855 = 94,312.12/x
  3. Step 3: Cross multiply
    128,148.72x = 176,855 × 94,312.12
  4. Step 4: Simplify right side
    128,148.72x = 16,679,569,982.60
  5. Step 5: Solve for x
    x = 16,679,569,982.60/128,148.72
  6. Step 6: Final answer
    x = 130,157.91

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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.