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Finding the Fourth Proportional to 223,972.80, 309,070.80 and 139,088.04

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Solution

The fourth proportional to 223,972.80, 309,070.80 and 139,088.04 is: 191,934.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,972.80 : 309,070.80 = 139,088.04 : x
  2. Step 2: Convert to fraction form
    223,972.80/309,070.80 = 139,088.04/x
  3. Step 3: Cross multiply
    223,972.80x = 309,070.80 × 139,088.04
  4. Step 4: Simplify right side
    223,972.80x = 42,988,051,793.23
  5. Step 5: Solve for x
    x = 42,988,051,793.23/223,972.80
  6. Step 6: Final answer
    x = 191,934.25

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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.