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Finding the Fourth Proportional to 152,085.70, 209,870.49 and 85,017.70

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Solution

The fourth proportional to 152,085.70, 209,870.49 and 85,017.70 is: 117,320.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,085.70 : 209,870.49 = 85,017.70 : x
  2. Step 2: Convert to fraction form
    152,085.70/209,870.49 = 85,017.70/x
  3. Step 3: Cross multiply
    152,085.70x = 209,870.49 × 85,017.70
  4. Step 4: Simplify right side
    152,085.70x = 17,842,706,357.67
  5. Step 5: Solve for x
    x = 17,842,706,357.67/152,085.70
  6. Step 6: Final answer
    x = 117,320.08

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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.