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Finding the Fourth Proportional to 124,686.95, 171,931.91 and 84,330.65

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Solution

The fourth proportional to 124,686.95, 171,931.91 and 84,330.65 is: 116,284.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,686.95 : 171,931.91 = 84,330.65 : x
  2. Step 2: Convert to fraction form
    124,686.95/171,931.91 = 84,330.65/x
  3. Step 3: Cross multiply
    124,686.95x = 171,931.91 × 84,330.65
  4. Step 4: Simplify right side
    124,686.95x = 14,499,128,444.73
  5. Step 5: Solve for x
    x = 14,499,128,444.73/124,686.95
  6. Step 6: Final answer
    x = 116,284.25

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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.