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Finding the Fourth Proportional to 99,490, 137,298.80 and 61,235.36

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Solution

The fourth proportional to 99,490, 137,298.80 and 61,235.36 is: 84,506.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,490 : 137,298.80 = 61,235.36 : x
  2. Step 2: Convert to fraction form
    99,490/137,298.80 = 61,235.36/x
  3. Step 3: Cross multiply
    99,490x = 137,298.80 × 61,235.36
  4. Step 4: Simplify right side
    99,490x = 8,407,541,445.57
  5. Step 5: Solve for x
    x = 8,407,541,445.57/99,490
  6. Step 6: Final answer
    x = 84,506.40

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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.