Home / 90,307.77-135,412.34-71,707.29

Finding the Fourth Proportional to 90,307.77, 135,412.34 and 71,707.29

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Solution

The fourth proportional to 90,307.77, 135,412.34 and 71,707.29 is: 107,521.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,307.77 : 135,412.34 = 71,707.29 : x
  2. Step 2: Convert to fraction form
    90,307.77/135,412.34 = 71,707.29/x
  3. Step 3: Cross multiply
    90,307.77x = 135,412.34 × 71,707.29
  4. Step 4: Simplify right side
    90,307.77x = 9,710,051,575.42
  5. Step 5: Solve for x
    x = 9,710,051,575.42/90,307.77
  6. Step 6: Final answer
    x = 107,521.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.