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Finding the Fourth Proportional to 101,918.20, 152,877.30 and 78,590.20

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Solution

The fourth proportional to 101,918.20, 152,877.30 and 78,590.20 is: 117,885.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,918.20 : 152,877.30 = 78,590.20 : x
  2. Step 2: Convert to fraction form
    101,918.20/152,877.30 = 78,590.20/x
  3. Step 3: Cross multiply
    101,918.20x = 152,877.30 × 78,590.20
  4. Step 4: Simplify right side
    101,918.20x = 12,014,657,582.46
  5. Step 5: Solve for x
    x = 12,014,657,582.46/101,918.20
  6. Step 6: Final answer
    x = 117,885.30

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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.