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Finding the Fourth Proportional to 201,909.90, 302,864.85 and 138,924.30

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Solution

The fourth proportional to 201,909.90, 302,864.85 and 138,924.30 is: 208,386.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,909.90 : 302,864.85 = 138,924.30 : x
  2. Step 2: Convert to fraction form
    201,909.90/302,864.85 = 138,924.30/x
  3. Step 3: Cross multiply
    201,909.90x = 302,864.85 × 138,924.30
  4. Step 4: Simplify right side
    201,909.90x = 42,075,287,280.86
  5. Step 5: Solve for x
    x = 42,075,287,280.86/201,909.90
  6. Step 6: Final answer
    x = 208,386.45

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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.