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Finding the Fourth Proportional to 153,909.84, 212,394.12 and 85,922.46

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Solution

The fourth proportional to 153,909.84, 212,394.12 and 85,922.46 is: 118,572.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,909.84 : 212,394.12 = 85,922.46 : x
  2. Step 2: Convert to fraction form
    153,909.84/212,394.12 = 85,922.46/x
  3. Step 3: Cross multiply
    153,909.84x = 212,394.12 × 85,922.46
  4. Step 4: Simplify right side
    153,909.84x = 18,249,425,279.94
  5. Step 5: Solve for x
    x = 18,249,425,279.94/153,909.84
  6. Step 6: Final answer
    x = 118,572.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.