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Finding the Fourth Proportional to 152,143.68, 209,958.12 and 85,075.68

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Solution

The fourth proportional to 152,143.68, 209,958.12 and 85,075.68 is: 117,404.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,143.68 : 209,958.12 = 85,075.68 : x
  2. Step 2: Convert to fraction form
    152,143.68/209,958.12 = 85,075.68/x
  3. Step 3: Cross multiply
    152,143.68x = 209,958.12 × 85,075.68
  4. Step 4: Simplify right side
    152,143.68x = 17,862,329,830.52
  5. Step 5: Solve for x
    x = 17,862,329,830.52/152,143.68
  6. Step 6: Final answer
    x = 117,404.35

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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.