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Finding the Fourth Proportional to 286,501.80, 429,752.16 and 76,139.72

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Solution

The fourth proportional to 286,501.80, 429,752.16 and 76,139.72 is: 114,209.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,501.80 : 429,752.16 = 76,139.72 : x
  2. Step 2: Convert to fraction form
    286,501.80/429,752.16 = 76,139.72/x
  3. Step 3: Cross multiply
    286,501.80x = 429,752.16 × 76,139.72
  4. Step 4: Simplify right side
    286,501.80x = 32,721,206,983.03
  5. Step 5: Solve for x
    x = 32,721,206,983.03/286,501.80
  6. Step 6: Final answer
    x = 114,209.43

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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.