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Finding the Fourth Proportional to 99,225.90, 136,964.38 and 65,256.32

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Solution

The fourth proportional to 99,225.90, 136,964.38 and 65,256.32 is: 90,075.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,225.90 : 136,964.38 = 65,256.32 : x
  2. Step 2: Convert to fraction form
    99,225.90/136,964.38 = 65,256.32/x
  3. Step 3: Cross multiply
    99,225.90x = 136,964.38 × 65,256.32
  4. Step 4: Simplify right side
    99,225.90x = 8,937,791,409.88
  5. Step 5: Solve for x
    x = 8,937,791,409.88/99,225.90
  6. Step 6: Final answer
    x = 90,075.19

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1.5x scale

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.