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Finding the Fourth Proportional to 125,085.74, 172,602.51 and 99,656.60

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Solution

The fourth proportional to 125,085.74, 172,602.51 and 99,656.60 is: 137,513.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,085.74 : 172,602.51 = 99,656.60 : x
  2. Step 2: Convert to fraction form
    125,085.74/172,602.51 = 99,656.60/x
  3. Step 3: Cross multiply
    125,085.74x = 172,602.51 × 99,656.60
  4. Step 4: Simplify right side
    125,085.74x = 17,200,979,298.07
  5. Step 5: Solve for x
    x = 17,200,979,298.07/125,085.74
  6. Step 6: Final answer
    x = 137,513.51

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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.