Home / 90,989.86-136,561.47-38,437.06

Finding the Fourth Proportional to 90,989.86, 136,561.47 and 38,437.06

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Solution

The fourth proportional to 90,989.86, 136,561.47 and 38,437.06 is: 57,687.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,989.86 : 136,561.47 = 38,437.06 : x
  2. Step 2: Convert to fraction form
    90,989.86/136,561.47 = 38,437.06/x
  3. Step 3: Cross multiply
    90,989.86x = 136,561.47 × 38,437.06
  4. Step 4: Simplify right side
    90,989.86x = 5,249,021,416.08
  5. Step 5: Solve for x
    x = 5,249,021,416.08/90,989.86
  6. Step 6: Final answer
    x = 57,687.98

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1.5x scale

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.