Home / 145,421.40-218,132.10-89,434.20

Finding the Fourth Proportional to 145,421.40, 218,132.10 and 89,434.20

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Solution

The fourth proportional to 145,421.40, 218,132.10 and 89,434.20 is: 134,151.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,421.40 : 218,132.10 = 89,434.20 : x
  2. Step 2: Convert to fraction form
    145,421.40/218,132.10 = 89,434.20/x
  3. Step 3: Cross multiply
    145,421.40x = 218,132.10 × 89,434.20
  4. Step 4: Simplify right side
    145,421.40x = 19,508,469,857.82
  5. Step 5: Solve for x
    x = 19,508,469,857.82/145,421.40
  6. Step 6: Final answer
    x = 134,151.30

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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.