Home / 155,931.77-215,184.80-87,949.31

Finding the Fourth Proportional to 155,931.77, 215,184.80 and 87,949.31

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Solution

The fourth proportional to 155,931.77, 215,184.80 and 87,949.31 is: 121,369.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,931.77 : 215,184.80 = 87,949.31 : x
  2. Step 2: Convert to fraction form
    155,931.77/215,184.80 = 87,949.31/x
  3. Step 3: Cross multiply
    155,931.77x = 215,184.80 × 87,949.31
  4. Step 4: Simplify right side
    155,931.77x = 18,925,355,036.85
  5. Step 5: Solve for x
    x = 18,925,355,036.85/155,931.77
  6. Step 6: Final answer
    x = 121,369.46

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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.