Home / 99,688.47-149,594.95-66,431.87

Finding the Fourth Proportional to 99,688.47, 149,594.95 and 66,431.87

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Solution

The fourth proportional to 99,688.47, 149,594.95 and 66,431.87 is: 99,689.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,688.47 : 149,594.95 = 66,431.87 : x
  2. Step 2: Convert to fraction form
    99,688.47/149,594.95 = 66,431.87/x
  3. Step 3: Cross multiply
    99,688.47x = 149,594.95 × 66,431.87
  4. Step 4: Simplify right side
    99,688.47x = 9,937,872,271.06
  5. Step 5: Solve for x
    x = 9,937,872,271.06/99,688.47
  6. Step 6: Final answer
    x = 99,689.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.