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Finding the Fourth Proportional to 157,298.76, 217,077.30 and 85,681.08

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Solution

The fourth proportional to 157,298.76, 217,077.30 and 85,681.08 is: 118,242.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,298.76 : 217,077.30 = 85,681.08 : x
  2. Step 2: Convert to fraction form
    157,298.76/217,077.30 = 85,681.08/x
  3. Step 3: Cross multiply
    157,298.76x = 217,077.30 × 85,681.08
  4. Step 4: Simplify right side
    157,298.76x = 18,599,417,507.48
  5. Step 5: Solve for x
    x = 18,599,417,507.48/157,298.76
  6. Step 6: Final answer
    x = 118,242.62

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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.