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Finding the Fourth Proportional to 99,065.04, 136,710 and 56,648.40

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Solution

The fourth proportional to 99,065.04, 136,710 and 56,648.40 is: 78,174.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,065.04 : 136,710 = 56,648.40 : x
  2. Step 2: Convert to fraction form
    99,065.04/136,710 = 56,648.40/x
  3. Step 3: Cross multiply
    99,065.04x = 136,710 × 56,648.40
  4. Step 4: Simplify right side
    99,065.04x = 7,744,402,764
  5. Step 5: Solve for x
    x = 7,744,402,764/99,065.04
  6. Step 6: Final answer
    x = 78,174.93

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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.