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Finding the Fourth Proportional to 99,203.04, 136,908.72 and 61,470

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Solution

The fourth proportional to 99,203.04, 136,908.72 and 61,470 is: 84,833.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,203.04 : 136,908.72 = 61,470 : x
  2. Step 2: Convert to fraction form
    99,203.04/136,908.72 = 61,470/x
  3. Step 3: Cross multiply
    99,203.04x = 136,908.72 × 61,470
  4. Step 4: Simplify right side
    99,203.04x = 8,415,779,018.40
  5. Step 5: Solve for x
    x = 8,415,779,018.40/99,203.04
  6. Step 6: Final answer
    x = 84,833.88

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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.