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Finding the Fourth Proportional to 86,510.16, 119,206.88 and 63,813.20

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Solution

The fourth proportional to 86,510.16, 119,206.88 and 63,813.20 is: 87,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,510.16 : 119,206.88 = 63,813.20 : x
  2. Step 2: Convert to fraction form
    86,510.16/119,206.88 = 63,813.20/x
  3. Step 3: Cross multiply
    86,510.16x = 119,206.88 × 63,813.20
  4. Step 4: Simplify right side
    86,510.16x = 7,606,972,474.82
  5. Step 5: Solve for x
    x = 7,606,972,474.82/86,510.16
  6. Step 6: Final answer
    x = 87,931.55

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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.