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Finding the Fourth Proportional to 90,312.78, 135,601.81 and 88,718.16

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Solution

The fourth proportional to 90,312.78, 135,601.81 and 88,718.16 is: 133,207.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,312.78 : 135,601.81 = 88,718.16 : x
  2. Step 2: Convert to fraction form
    90,312.78/135,601.81 = 88,718.16/x
  3. Step 3: Cross multiply
    90,312.78x = 135,601.81 × 88,718.16
  4. Step 4: Simplify right side
    90,312.78x = 12,030,343,075.87
  5. Step 5: Solve for x
    x = 12,030,343,075.87/90,312.78
  6. Step 6: Final answer
    x = 133,207.54

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1.5x scale

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.