Home / 145,509.12-200,630.82-99,590.91

Finding the Fourth Proportional to 145,509.12, 200,630.82 and 99,590.91

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Solution

The fourth proportional to 145,509.12, 200,630.82 and 99,590.91 is: 137,317.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,509.12 : 200,630.82 = 99,590.91 : x
  2. Step 2: Convert to fraction form
    145,509.12/200,630.82 = 99,590.91/x
  3. Step 3: Cross multiply
    145,509.12x = 200,630.82 × 99,590.91
  4. Step 4: Simplify right side
    145,509.12x = 19,981,005,558.95
  5. Step 5: Solve for x
    x = 19,981,005,558.95/145,509.12
  6. Step 6: Final answer
    x = 137,317.89

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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.