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Finding the Fourth Proportional to 229,018.50, 316,045.53 and 128,416.50

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Solution

The fourth proportional to 229,018.50, 316,045.53 and 128,416.50 is: 177,214.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,018.50 : 316,045.53 = 128,416.50 : x
  2. Step 2: Convert to fraction form
    229,018.50/316,045.53 = 128,416.50/x
  3. Step 3: Cross multiply
    229,018.50x = 316,045.53 × 128,416.50
  4. Step 4: Simplify right side
    229,018.50x = 40,585,460,803.25
  5. Step 5: Solve for x
    x = 40,585,460,803.25/229,018.50
  6. Step 6: Final answer
    x = 177,214.77

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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.