Home / 430,897,985.01-646,437,766.05-139,742,405.76

Finding the Fourth Proportional to 430,897,985.01, 646,437,766.05 and 139,742,405.76

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Solution

The fourth proportional to 430,897,985.01, 646,437,766.05 and 139,742,405.76 is: 209,643,051.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,897,985.01 : 646,437,766.05 = 139,742,405.76 : x
  2. Step 2: Convert to fraction form
    430,897,985.01/646,437,766.05 = 139,742,405.76/x
  3. Step 3: Cross multiply
    430,897,985.01x = 646,437,766.05 × 139,742,405.76
  4. Step 4: Simplify right side
    430,897,985.01x = 90,334,768,601,947,040
  5. Step 5: Solve for x
    x = 90,334,768,601,947,040/430,897,985.01
  6. Step 6: Final answer
    x = 209,643,051.82

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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.