Home / 85,631.65-128,459.78-26,471.93

Finding the Fourth Proportional to 85,631.65, 128,459.78 and 26,471.93

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Solution

The fourth proportional to 85,631.65, 128,459.78 and 26,471.93 is: 39,711.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,631.65 : 128,459.78 = 26,471.93 : x
  2. Step 2: Convert to fraction form
    85,631.65/128,459.78 = 26,471.93/x
  3. Step 3: Cross multiply
    85,631.65x = 128,459.78 × 26,471.93
  4. Step 4: Simplify right side
    85,631.65x = 3,400,578,492.77
  5. Step 5: Solve for x
    x = 3,400,578,492.77/85,631.65
  6. Step 6: Final answer
    x = 39,711.70

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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.