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Finding the Fourth Proportional to 100,158.51, 138,312.41 and 64,410.58

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Solution

The fourth proportional to 100,158.51, 138,312.41 and 64,410.58 is: 88,946.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,158.51 : 138,312.41 = 64,410.58 : x
  2. Step 2: Convert to fraction form
    100,158.51/138,312.41 = 64,410.58/x
  3. Step 3: Cross multiply
    100,158.51x = 138,312.41 × 64,410.58
  4. Step 4: Simplify right side
    100,158.51x = 8,908,781,881.46
  5. Step 5: Solve for x
    x = 8,908,781,881.46/100,158.51
  6. Step 6: Final answer
    x = 88,946.83

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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.