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Finding the Fourth Proportional to 157,298.66, 217,075.48 and 85,678.51

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Solution

The fourth proportional to 157,298.66, 217,075.48 and 85,678.51 is: 118,238.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,298.66 : 217,075.48 = 85,678.51 : x
  2. Step 2: Convert to fraction form
    157,298.66/217,075.48 = 85,678.51/x
  3. Step 3: Cross multiply
    157,298.66x = 217,075.48 × 85,678.51
  4. Step 4: Simplify right side
    157,298.66x = 18,598,702,170.16
  5. Step 5: Solve for x
    x = 18,598,702,170.16/157,298.66
  6. Step 6: Final answer
    x = 118,238.15

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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.