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Finding the Fourth Proportional to 124,179.48, 171,357.66 and 86,535

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Solution

The fourth proportional to 124,179.48, 171,357.66 and 86,535 is: 119,411.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,179.48 : 171,357.66 = 86,535 : x
  2. Step 2: Convert to fraction form
    124,179.48/171,357.66 = 86,535/x
  3. Step 3: Cross multiply
    124,179.48x = 171,357.66 × 86,535
  4. Step 4: Simplify right side
    124,179.48x = 14,828,435,108.10
  5. Step 5: Solve for x
    x = 14,828,435,108.10/124,179.48
  6. Step 6: Final answer
    x = 119,411.32

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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.