Home / 128,152.48-192,044.40-72,631.20

Finding the Fourth Proportional to 128,152.48, 192,044.40 and 72,631.20

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Solution

The fourth proportional to 128,152.48, 192,044.40 and 72,631.20 is: 108,842.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,152.48 : 192,044.40 = 72,631.20 : x
  2. Step 2: Convert to fraction form
    128,152.48/192,044.40 = 72,631.20/x
  3. Step 3: Cross multiply
    128,152.48x = 192,044.40 × 72,631.20
  4. Step 4: Simplify right side
    128,152.48x = 13,948,415,225.28
  5. Step 5: Solve for x
    x = 13,948,415,225.28/128,152.48
  6. Step 6: Final answer
    x = 108,842.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.