Home / 85,929.48-128,769.66-61,018.38

Finding the Fourth Proportional to 85,929.48, 128,769.66 and 61,018.38

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Solution

The fourth proportional to 85,929.48, 128,769.66 and 61,018.38 is: 91,439.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,929.48 : 128,769.66 = 61,018.38 : x
  2. Step 2: Convert to fraction form
    85,929.48/128,769.66 = 61,018.38/x
  3. Step 3: Cross multiply
    85,929.48x = 128,769.66 × 61,018.38
  4. Step 4: Simplify right side
    85,929.48x = 7,857,316,046.35
  5. Step 5: Solve for x
    x = 7,857,316,046.35/85,929.48
  6. Step 6: Final answer
    x = 91,439.12

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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.