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Finding the Fourth Proportional to 105,370.16, 157,888.79 and 85,551.89

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Solution

The fourth proportional to 105,370.16, 157,888.79 and 85,551.89 is: 128,192.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,370.16 : 157,888.79 = 85,551.89 : x
  2. Step 2: Convert to fraction form
    105,370.16/157,888.79 = 85,551.89/x
  3. Step 3: Cross multiply
    105,370.16x = 157,888.79 × 85,551.89
  4. Step 4: Simplify right side
    105,370.16x = 13,507,683,966.55
  5. Step 5: Solve for x
    x = 13,507,683,966.55/105,370.16
  6. Step 6: Final answer
    x = 128,192.69

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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.