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Finding the Fourth Proportional to 154,312.16, 212,865.03 and 89,774.15

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Solution

The fourth proportional to 154,312.16, 212,865.03 and 89,774.15 is: 123,838.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,312.16 : 212,865.03 = 89,774.15 : x
  2. Step 2: Convert to fraction form
    154,312.16/212,865.03 = 89,774.15/x
  3. Step 3: Cross multiply
    154,312.16x = 212,865.03 × 89,774.15
  4. Step 4: Simplify right side
    154,312.16x = 19,109,776,068.65
  5. Step 5: Solve for x
    x = 19,109,776,068.65/154,312.16
  6. Step 6: Final answer
    x = 123,838.44

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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.