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Finding the Fourth Proportional to 162,123.90, 243,210.30 and 77,868.21

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Solution

The fourth proportional to 162,123.90, 243,210.30 and 77,868.21 is: 116,814.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,123.90 : 243,210.30 = 77,868.21 : x
  2. Step 2: Convert to fraction form
    162,123.90/243,210.30 = 77,868.21/x
  3. Step 3: Cross multiply
    162,123.90x = 243,210.30 × 77,868.21
  4. Step 4: Simplify right side
    162,123.90x = 18,938,350,714.56
  5. Step 5: Solve for x
    x = 18,938,350,714.56/162,123.90
  6. Step 6: Final answer
    x = 116,814.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.