Home / 156,929.20-216,541.08-100,300.40

Finding the Fourth Proportional to 156,929.20, 216,541.08 and 100,300.40

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Solution

The fourth proportional to 156,929.20, 216,541.08 and 100,300.40 is: 138,400.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,929.20 : 216,541.08 = 100,300.40 : x
  2. Step 2: Convert to fraction form
    156,929.20/216,541.08 = 100,300.40/x
  3. Step 3: Cross multiply
    156,929.20x = 216,541.08 × 100,300.40
  4. Step 4: Simplify right side
    156,929.20x = 21,719,156,940.43
  5. Step 5: Solve for x
    x = 21,719,156,940.43/156,929.20
  6. Step 6: Final answer
    x = 138,400.99

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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.