Home / 90,606.04-136,130.58-85,570.36

Finding the Fourth Proportional to 90,606.04, 136,130.58 and 85,570.36

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Solution

The fourth proportional to 90,606.04, 136,130.58 and 85,570.36 is: 128,564.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,606.04 : 136,130.58 = 85,570.36 : x
  2. Step 2: Convert to fraction form
    90,606.04/136,130.58 = 85,570.36/x
  3. Step 3: Cross multiply
    90,606.04x = 136,130.58 × 85,570.36
  4. Step 4: Simplify right side
    90,606.04x = 11,648,742,737.61
  5. Step 5: Solve for x
    x = 11,648,742,737.61/90,606.04
  6. Step 6: Final answer
    x = 128,564.75

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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.