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Finding the Fourth Proportional to 123,671,999.80, 185,507,999.70 and 42,892,967.80

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Solution

The fourth proportional to 123,671,999.80, 185,507,999.70 and 42,892,967.80 is: 64,339,451.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,671,999.80 : 185,507,999.70 = 42,892,967.80 : x
  2. Step 2: Convert to fraction form
    123,671,999.80/185,507,999.70 = 42,892,967.80/x
  3. Step 3: Cross multiply
    123,671,999.80x = 185,507,999.70 × 42,892,967.80
  4. Step 4: Simplify right side
    123,671,999.80x = 7,956,988,657,774,509
  5. Step 5: Solve for x
    x = 7,956,988,657,774,509/123,671,999.80
  6. Step 6: Final answer
    x = 64,339,451.70

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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.