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Finding the Fourth Proportional to 86,908.80, 119,937.72 and 53,385.60

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Solution

The fourth proportional to 86,908.80, 119,937.72 and 53,385.60 is: 73,674.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,908.80 : 119,937.72 = 53,385.60 : x
  2. Step 2: Convert to fraction form
    86,908.80/119,937.72 = 53,385.60/x
  3. Step 3: Cross multiply
    86,908.80x = 119,937.72 × 53,385.60
  4. Step 4: Simplify right side
    86,908.80x = 6,402,947,144.83
  5. Step 5: Solve for x
    x = 6,402,947,144.83/86,908.80
  6. Step 6: Final answer
    x = 73,674.32

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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.