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Finding the Fourth Proportional to 100,624.88, 138,875.51 and 64,918.77

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Solution

The fourth proportional to 100,624.88, 138,875.51 and 64,918.77 is: 89,596.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,624.88 : 138,875.51 = 64,918.77 : x
  2. Step 2: Convert to fraction form
    100,624.88/138,875.51 = 64,918.77/x
  3. Step 3: Cross multiply
    100,624.88x = 138,875.51 × 64,918.77
  4. Step 4: Simplify right side
    100,624.88x = 9,015,627,292.32
  5. Step 5: Solve for x
    x = 9,015,627,292.32/100,624.88
  6. Step 6: Final answer
    x = 89,596.40

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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.