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Finding the Fourth Proportional to 218,792.86, 302,034.95 and 128,136.22

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Solution

The fourth proportional to 218,792.86, 302,034.95 and 128,136.22 is: 176,887.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,792.86 : 302,034.95 = 128,136.22 : x
  2. Step 2: Convert to fraction form
    218,792.86/302,034.95 = 128,136.22/x
  3. Step 3: Cross multiply
    218,792.86x = 302,034.95 × 128,136.22
  4. Step 4: Simplify right side
    218,792.86x = 38,701,616,800.89
  5. Step 5: Solve for x
    x = 38,701,616,800.89/218,792.86
  6. Step 6: Final answer
    x = 176,887.02

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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.